Gall’s Law & System Components

“One essential characteristic of modern life is that we all depend on systems—on assemblages of people or technologies or both—and among our most profound difficulties is making them work.”

Atul Gawande (The Checklist Manifesto)

Systems are everything.

Our body is a system of organs, chemical reactions, and energy. There are a bunch of little integrated things happening within us all the time. Every cell inside our body is a system, every organelle is a system, ever molecule is a system, all the way down to the subatomic level there are systems.

But it doesn’t stop there, we can see systems on the macro level too. Our neighborhoods, cities, countries, and the entire planet are all systems. Systems can even be as big as galaxies, or the universe!

Systems also exist on a conversational level. In some of my other posts, I talk a little bit about how people live in the physical world, but also in the world of conversation. Some of these conversations share our reality. An example of these types of conversations are businesses. “Where is a business?” is a tricky question. The business doesn’t necessarily lie in the people, or the physical headquarters, but in an agreement and understanding between two people. Similar to our bodies and communities –

“Businesses are complex systems that exist within even more complex systems—markets, industries, and societies. A complex system is a self-perpetuating arrangement of interconnected parts that form a unified whole.”

Josh Kaufman (The Personal MBA)

Understanding systems, as an abstract idea, gives us the ability to apply our analysis and understanding to all other systems.

I learned a lot about systems when I was studying chemical engineering and used that knowledge to dive deeper into other fields.

I used my knowledge of systems to help me understand music, mathematics, medicine, social dynamics, education, economics, investing, writing, gaming, and so much more.

Understanding systems help us understand everything. Most systems have the same parts, can be analyzed and improved in similar ways, and follow the same set of rules.

Gall’s Law

“A complex system that works is invariably found to have evolved from a simple system that worked. The inverse proposition also appears to be true: a complex system designed from scratch never works and cannot be made to work. You have to start over, beginning with a simple system.

John Gall (Systems Theorist)

Most of the systems we’ll encounter are complex. Way more complicated than we know, but according to systems theorist John Gall, all complex systems started from simple systems. This idea became known as Gall’s Law and is extremely useful when it comes to understanding systems.

Every system starts off simple and adds complexity over time.

I’ve watched this happen with the development of smartphones over the years. First, we started with just phones that just did good ol’ phone calls. Then we developed phones that could text, then play music, then browse the internet, then take pictures, then take videos, and now…they can do everything. My smartphone is my camera, periodic table, phone, tv remote, thermostat controller, and an infinite amount of other things.

The bottom line is that my devices are extremely complicated systems that can do a lot of amazing things, but they didn’t start off that way. In the beginning, they were just simple systems that did one thing, and over time we just added one thing here and one thing there and now we have miraculous systems.

I find keeping Gall’s Law in mind helpful when creating new systems. When I’m first starting something I just want to keep it short and simple, then add a little more over time.

How Understanding Systems Can Make Us Rich

I used Gall’s Law to create a money management system that allows me to accumulate wealth over time automatically, rather than constantly worrying about “trying to become rich” or “not having enough.”

The key is to start simple, then make it complex over time. I’m not going to go into too much detail here about how I manage my money (partly because my system has grown to be pretty complicated), but I will share the simple system I started to build my complex system upon. I put a percentage of my money in an investment account, and I don’t touch it. I don’t even have access to it unless I want to wait 3 days. I don’t want to touch the money, because I will need it later to build a more complex system later.

Now I know this doesn’t seem exciting or sexy, but this is how complex systems are built. One thing at a time, over a long period of time.

The key is to start with a simple system.

When I started my blog, I just tried to write 20 minutes every day and release 1 post per week. This is still the fundamental system of my blog today, but I write for 48 minutes per day 5 days a week instead.

When I started my YouTube channel, I just tried to make music for 20 minutes every day and release 2 beats per week. Over time, I started adding beat making videos, links to my beat store, and playlists of other videos. Now, my channel is much more complex than it was when I first started and I would not have been able to create that level of complexity right at the start. Trust me, I tried to and it ended in fire.

Components of a System

So what actually makes up a system?

Josh Kaufman does a beautiful job laying out how to understand, analyze, and improve systems in his book, The Personal MBA, and I highly recommend checking it out. Most of the stuff from this post are from his book. I’ll definitely be adding it to my Must-Read Book List once I get a chance.

If we want to build a simple system, then we have to know what the components of a system are. These 14 components can be found in every system, regardless of what the system does. We can find examples of each component in all industries.

Flow

Flow is easily thought of as the movement of resources through the system. Inflows move into the system. Outflows move out of the system.

Money is a common resource that flows in and out of business systems and water is a common resource that flows in and out of biological systems.

Stock

Stock, in the sense of systems, is a reserve of resources. Stock can be different for each system. For a business, stock can be money waiting to be used. For a restaurant, stock can be extra food in the back.

Slack

Slack refers to the amounts of resources available in the stock. On a personal note, I love slack. Slack isn’t inherently good, or bad. It depends on the system. For me, I’ve noticed that I make better creative work when I have more slack in my stock. I make better music and write better blog posts when I’m not up against the clock.

Constraints

Constraints are what prevents systems from achieving their goal. Israeli author, Eliyahu Goldratt, suggests that all systems always have at least 1 constraint limiting their ability to reach their goal. Eliminate the constraints and performance increases, simple as that.

Feedback Loops

I remember taking a biology class in my 2nd year of college and my professor explaining feedback loops to me for the first time. He said that if we can wrap our heads around feedback loops, then we’ll understanding 80% of biology. He was so right, understanding the feedback loop made learning biology a lot easier, but it also provided a framework for understanding so many other things too.

A feedback loop occurs when the output of a system is also an input. An excellent example of this is with the heart and blood pressure. Blood pressure is an output of the heart, but it’s also one of the inputs as well. The human body needs to maintain a certain blood pressure to survive. If it gets too low, then the heart will pump harder to get it back up. The blood pressure is determined by the heart, but the blood pressure also provides feedback to the heart.

A positive feedback loop is when a system receives feedback and produces more of its output as a result. We can see this in the example with the heart and low blood pressure. The heart is pumping more as a result of the feedback.

A negative feedback loop is when a system receives feedback and produces less of its output as a result. Our bodies also have negative feedback loops (because they’re systems!). Typically when our bodies become hot we start to sweat to cool us down, but if we were to become severely dehydrated then our bodies would stop sweating in order to keep as much water inside as possible. Our bodies will also shut down our ability to pee, just to keep in that water too! The body stops releasing water as a result of the feedback.

Autocatalysis

This describes a system where the outputs are the raw ingredients of the input.

Advertising is a great example of this. We spend $1000 dollars to make $2000 dollars. Now we can use $1000 again to buy more advertisements and make another $2000. Rise and repeat.

After reading a bunch of business books, I realize that a lot of entrepreneurs use autocatalysis type of systems to build wealth.

Environment

This is everything else that that system isn’t. Usually, the system lies within the environment. There is typically some sort of flow between the environment and the system. No system exists in the vacuum…unless you consider the entire universe as a system.

Selection Test

This refers to the environmental constraints that determine which systems perpetuate or end.

The phrase “survival of the fittest” is what people usually think of when they think of selection tests, but “death of the unfit” is probably a more accurate phrasing.

Selection Tests are absolute. If a system cannot adapt to the test, then it fails. If the system can adapt, then it thrives. Simple as that.

Uncertainty

Uncertainty is inherent to all systems. No one knows for sure what will happen in the future. But there is a distinction to be made from risk. The risk lies in the known unknowns, the things we know that we don’t know. Uncertainties are the unknown unknowns, the things we don’t know that we don’t know.

It’s helpful to keep in mind that we process the unknown the same way that we process threats. We literally see and respond to what we don’t know as a threat.

I know it’s hard, but try not to be completely afraid of the unknown.

Change

“It is not the strongest of the species that survives, nor the most intelligent, but the one most responsive to change.”

Charles Darwin (1809 – 1882)

All systems have some dynamic quality to them — they are always changing. Knowing this, training ourselves to handle different kinds of circumstances is our best bet. If things are always changing, then we need to be resilient to match.

Interdependence

Some systems are linked to other systems. The more connected the systems are the more failures and delays will affect other systems. When we are dealing with systems, it’s crucial to keep in mind their effect on other systems and the systems that affect it. These connections are also known as dependencies.

The fewer dependencies the systems have, the lower the magnitude of effect on the other systems.

Some systems may not affect each other at all, but are both required to run a larger system. These systems are known as parallel processing.

Here’s a fun thought experiment that gets crazier the longer we think about it — the next time you get on a bus, think about all of the things that must have had to happen in order for the bus to get there on time. I promise, there is always more.

Counterparty Risk

Counterpart Risk describes the risk associated with the other party not following through on their end of the deal. Most systems require multiple parties and there are consequences when one party can’t or won’t deliver on what they promise.

If we outsource a task to a contractor and they don’t deliver their end, our entire project will get held up. Spotting counterparty risk is crucial in preparing for potential undesirable events as well as identifying good deals. Finding ways to mitigate this risk helps us keep our plans on track and lowers the chances for our systems to get derailed.

However, counterparty risk tends to increase when people try to plan for them. The best way to deal with counterparty risk is to have a plan of action in the event that the other party does not deliver on their end of the deal.

Second-Order Effects

These describe the consequences of the consequences of our actions, hence second-order. Every action has a consequence, and those consequences also have an affect on other things. Second-order effects are typically difficult to predict, stop, or reverse, but they always exist.

With this in mind, it’s wise to proceed with caution when we make changes to systems, especially complex ones. We may even get the opposite of what we expect.

Normal Accidents

We all know shit happens, and it’s no different in systems. Some days things don’t go the way we want. Especially in systems with high interdependence and complexity. The more interdependent and complex a system is, the more likely an accident is to occur.

Normal accidents can give us enormous insights into system interdependence and possible second-order effects.


Systems are everything and understanding their parts is crucial for building our own.

Gall’s Law shows us that we can create complex systems from starting small and gradually growing over time.

Each of the components I’ve gone over can be found in all (if not, most) systems, and I urge everyone who reads this to find other components of systems if possible. I’m not a systems theorist and it’s more than likely that there are other components I left out. These were the system components that Josh Kaufman went over his book, The Personal MBA, and they are a great foundation for building any kind of system you desire.

Identify these components in other systems. Use these as building blocks to create your own. What we can do with these tools is truly unlimited.

The Hero of Heroes: Marduk vs. Tiamat & The Significance of Speech

“A problem well put is half-solved.”

John Dewey (1859 – 1952)

An Invisible World

In my last post, I bring up the idea of analyzing hero myths for commonalities in order to find traits that would bring us success in any pursuit we choose.

What a mouthful.

I specifically brought up The Osiris Myth and how that story illustrates the power of attention. This post is going to focus on another powerful aspect of the hero of heroes, speech.

Similar to attention, speech is highly overlooked.

In Sapiens: A Brief History of Humankind, renowned Israeli historian, Yuval Noah Harari, provides a beautiful timeline of history. It starts from matter and energy appearing marking the dawn of physics and takes us all the way to the present and into a potential future. In this timeline, we see different human species appear and either evolve or die out. Obviously, we know how this story ends. Us, the homo sapiens, end up dominating the planet.

But why? What makes homo sapiens the dominant human species?

Harari argues that is it our unique ability to communicate through complex language. Homo sapiens were the only human species that were capable of communicating on a massive scale. That gives us a huge advantage over the other species. That combined with our unprecedented cognitive abilities makes us the most powerful creatures on earth.

Everything we do on this planet is created by us and our ability to communicate through complex language. Yuval talks about this idea of human beings living in two worlds simultaneously; the real tangible world and the “imaginary” world of conversation. I like to think of this “imaginary” world as the world of conversation, speech, or logos rather than “imaginary.” Referring to this world as imaginary carries implications that it’s not real. If anything, the world of conversation is more real than the tangible world.

From my experience and observations, unless overridden by conscious free will, the human being primarily lives in the world of conversation. We experience our lives as a narrative, a conversation, but we also create things external to us in that conversational world.

Let me explain using businesses as an example.

Businesses in society are not physical entities, but a conversation we are having with one another.

In Sapiens, Harari brings up Google to illustrate this point. If we were to destroy the Google headquarters, would Google disappear? No, it wouldn’t because we could rebuild it.

If we replaced all the people who worked for Google with a whole new batch of people, would Google disappear? No, not really. It might be a different company, but it could still very well be Google as we know it.

This little thought experiment is fun because it highlights the fallacies in thinking that we live in a purely physical and tangible world. Google exists in the world of conversation and because of that, we could destroy the things that represent Google in the real world, and Google could still exist.

I argue that the conversations that we’re apart of matters much more than where we are in the physical world. I’ve seen happy people in terrible places and I’ve seen miserable people in beautiful places. What determines their happiness or misery is the conversation they’re in.

People live in conversations.

Businesses are conversations. Relationships are conversations. Jobs are conversations.

Sometimes we add tangible symbols to keep the conversation boundaries clear in the physical world. We see this in things like wedding rings or uniforms. Nothing changes physically when someone gets married, but we all understand that there’s still a huge transformation that takes place. When someone changes from fiance to wife or husband, there’s a transformation in the conversation & the way we act changes along with that conversation. We symbolize that change in the physical world with wedding rings, marriage certificates, and other things.

When my girlfriend and I first started dating, nothing changed physically, but we started changing how we behaved because things have changed in the world of conversation.

The same thing happened when I became an EMT. Nothing changed physically, except maybe a few neural pathways. I was physically the same person, but the conversation I participated in was different.

We create the world with our language. Change the conversation, change the world.

I know this idea seems a little extreme, but it seems like the Mesopotamians understood this as well.

Speech

Tiamat and Marduk

This story depicts how the Mesopotamians believed the world came to be and the origins of the first men. It’s one of the oldest stories known to man and it is filled to the brim with powerful and timeless lessons. I’ll be interjecting with some analysis in italics throughout the story.

It begins with Tiamat, the goddess of saltwater, and Apsu, the god of freshwater coming together in the Tigris and Euphrates rivers to create the world, Mesopotamia.

Tiamat is more than just the goddess of saltwater, she is also the mother of everything and the goddess of Chaos. Together, Tiamat and Apsu populated Mesopotamia with young gods.

Chaos & Order. The Anima & Animus. Tiamat & Apsu

Tiamat is the archetypical representation of the anima. She is the chaos from which life springs and Apsu is the penetrative decisive force necessary to keep them alive. In some ways, Apsu is the archetypical old wise king, the positive masculine, and the animus.

There are also representations of Tiamat and Apsu drawn as serpents wrapped around each other and look eerily similar to DNA. How the Mesopotamians knew that is way beyond me.

As time goes on, the young gods become troublesome and begin to act recklessly. One night, the young gods disturb Apsu while he’s sleeping. In his frustration, Apsu tells Tiamat that they need to destroy the younger gods because they weren’t acting properly. Tiamat disagrees with Apsu and urges to protect the young gods, but it was too late. Ea, (a god of knowledge, mischief, and sweet water) discovered Apsu’s plan to destroy the young gods and sends him into an eternal sleep, death.

Naturally, the younger generations start acting in ways that the judgemental farther (animus archetype) does not approve of. Apsu doesn’t believe his creations are bringing order to the chaos, judges them accordingly, and wants to destroy them as a result. Not surprising considering that the animus archetype either protects or destroys. Of course, like any good mother, Tiamat strives to protect her children (a hallmark anima trait) but in the end, the young gods end up destroying Apsu, the order of the old.

Younger generations are constantly looking to understand the world around them and older generations are constantly working to give them answers. The issue arises when the younger generation doesn’t see the value in the old ways. Perhaps the old ways of doing things are outdated and need to be changed. Perhaps the new ways of doing things aren’t the best and the young people who practice these methods are doomed to repeat mistakes of the past. Either way, there is a mismatch between the young and old and it almost always results in the young destroying the old ways.

So what happens when we destroy what our predecessors have given us?

Chaos reigns.

Tiamat hears of Apsu’s death and is furious. She creates an army of monsters to destroy the young gods in retribution for the death of Apsu. She places Qingu, one of the few gods she trusts, as head of the army and gives him the Tablet of Destinies to wear as a breastplate. The Tablet of Destinies was the story of the world and what was written on the tablet is what happened. Because of this, the tablet gave Qingu immense power.

Tiamat’s rage echos themes of flood myths that can be found all over the world. In most cultures, you can find a myth of a great flood wiping out the world. In this story, Tiamat doesn’t necessarily drown the world but she is the goddess of chaos and saltwater and her will is to destroy the world because it has become too corrupt.

The young gods are terrified of Tiamat’s wrath and know that they cannot defeat her despite their powers, so they elect a champion, Marduk, to fight on their behalf. Marduk had eyes all around his head and could speak magic words. He was the only god who was brave and strong enough to take on this battle. He made a deal with the younger gods and told them that if he defeated Tiamat, then they must make him king of the gods and give him the Tablet of Destinies.

Marduk, the hero of the gods, the only opportunity to overcome chaos, harnesses the power of attention and speech.

I think this idea is so powerful. The only way we can have a fighting chance to triumph over chaos is through our attention and speech.

Also, the younger gods are also willing to give him the Tablet of Destinies if he can defeat chaos. How cool? The hero that uses their powers of attention and speech to overcome chaos, will determine what happens in the world. The will of the hero can surpass the will of the gods, so to speak. The hero will no longer be under the influence of the gods and can create the world in his image.

So Marduk went to war. He armed himself with a net and a sword. The battle was long and difficult. The more Marduk would attack Tiamat the stronger she became. She grew more monstrous with every swing of his sword. Tiamat takes the form of a dragon and begins destroying everything around her, but Marduk doesn’t quit. Eventually, he catches Tiamat in his net and chops her into pieces.

Marduk vs. Tiamat

From her body, Marduk creates the sky and the earth. From her blood, he creates the first man tasked to be servants of the gods with the responsibility to maintain order and keep chaos at bay.

The Fall of Tiamat

So Marduk, the hero, confronts chaos with his net and his sword. This is particularly interesting because this is similar to how we psychologically grasp the unknown. When we are confronted with something that we don’t know, we try to grab for a general understanding (the net), then learn the details in pieces (the sword). I like to use this idea to study better, creating a general knowledge frame to understand something then learning the details after makes learning really complicated concepts much more manageable. I talk about this in my post, Strategies of Better Studying (Part 3).

When Marduk when to war with Tiamat she grew stronger with every attempt to contain her and eventually began destroying everything around her. When we confront chaos, it will get ugly and things will be destroyed, but persistence will be the only way victory. Finding the balance to know which is tolerable destruction and which is irreparable damage is difficult, but solace can be found knowing that things will get ugly.

Notice how in the end humans are created from Tiamat (life; the anima) and the thing that harnesses attention and speech. I think this shows that the Mesopotamians noticed that a part of us, human beings, had powers like Marduk but was placed in bodies created from Tiamat.

I’ve also heard versions where the people were created from the blood of Qingu. I think that’s an interesting take on the story and also carries wisdom, but I’m not going to dive too deep into that here.

Not only were we created from the same thing that created everything else, but we were also tasked to serve the gods and mediate between chaos and order. This gave the Mesopotamians an understanding of why we felt controlled by things beyond us at times. Like jealousy or lust. The Mesopotamian gods represent a lot of what modern people would call emotional states. Carl Jung said when we stopped believing in the gods, we put them inside of us.

It is also our job to be like Marduk and maintain the balance between chaos and order. If we do, we get to be like Marduk. Access to the Tablet of Destinies and be king of the gods. This is an idea I think the Mesopotamians really captured well: the hero who maintains a proper balance between chaos and order will determine what happens in the world and will not unwillingly fall to the influence of their emotions or primal instincts.


Similar to Marduk, human beings speak magic words. We use our speech to craft the world around us and it’s truly magical how it happens. What we say has a very real impact on the world as we know it. From the story, we know that the hero who harnesses speech and attention and willingly confronts chaos gets to determine what happens. This is a powerful lesson, but that leaves us with an important question:

What does it mean to harness speech?

I don’t have a clear cut answer, but I think it’s something like understanding that there is immense power in what we say but to take it further and to use that power to confront potential and bring about our will.

Harnessing speech requires a focusing of attention on our language.

How we phrase things is how we understand them.

Harnessing speech involves practicing multiple iterations of phrasing ideas while refining the meaning more accurately each time.

Harnessing speech involves practicing specificity.

From my experience, whenever I’ve experienced frustration or irritation, it comes from a lack of specificity or too much generality. For example, when I was first working on my YouTube channel I was frequently frustrated because there were so many little decisions to make. I had no idea where to start and the whole thing seemed like a terrible idea.

But then I started writing down the issues down one by one. What’s the font for my brand? What is my logo? What are the structures to the beats? What are my upload days? What genre of music am I making?

Slowly, the task became less and less frustrating.

I had to focus and articulate the chaos into something small and actionable.

Once I started doing that, there was another layer of specificity. What font size should I use? What are my brand colors? What are the titles of the videos I’m uploading? What time am I uploading?

I felt like Marduk throughout the whole process — slowly cutting the chaos into smaller and smaller pieces using my speech. The way we overcome chaos is through using our language to break up the overwhelming monster into manageable pieces.

So this poses the question: if the Meopotampians meant this, then why didn’t they just say it?

Again, not a perfect answer but I think it’s because language development is a long and difficult process. The Mesopotamians saw this lesson. They knew it to be true. But they could not say it outright because we, as a human race, did not have enough iterations to be able to clearly spell out that message. We can today because we’ve had thousands of years to be able to retell the story, refining the message with every rep.

This also mirrors the battle between Marduk and Tiamat. The battle was long, but after a while, Marduk was able to capture the Tiamat (chaos, the unknown) and chop it up. The Meopotampians captured this idea, so to speak, but we have been able to chop it up and understand it on a deeper and clearer level.

Over time, messages from the great myths become clearer and clearer, provided that the ones confronting the unknown are harnessing their powers of attention and speech in a responsible and constructive way.

I’ve seen this to be true in writing too. The age-old phrase that I’m learning to accept captures it perfectly — writing is rewriting. I used to think that writers just wrote down whatever they wanted to write the first time through, but I’m starting to see that there are significant differences between the first iteration of something and the 10th or 20th.

I try to embrace the idea and use it to write my blog. I usually write something that barely makes any sense at first, then I try to make it clearer with each rewrite.

This blog post literally started as “Mesopotamian God Story – the being that confronts chaos is the thing that chooses the destiny – articulation – logos – speech.” As you can see, I’ve fleshed it out a bit more.

Another place I’ve seen this idea is in Napoleon Hill’s fantastic book, Outwitting the Devil. It’s on my Must-Read Book List. In his book, he talks about the importance of definitive purpose and how it is what separates the drifters from the non-drifters. The act of defining purpose is a form of harnessing speech. Defining purpose requires us to use language to carve out exactly what we want from the unknown. Creating or defining purpose is a great way to get people to consciously grab hold and actively participate in the world of conversation, especially if they don’t have the vocabulary to do so.

I also think it’s worth mentioning that our brains have systems for dealing with environments that they don’t understand, I talk a little about this in my post The Brain vs. The Mind (Part 1). These systems in our brains are primarily associated with negative emotion. We experience negative emotion when we find ourselves in places that we don’t know how to navigate (chaotic environments). When we’re in predictable environments, we experience positive emotion. Like the humans created in the story, we must manage the balance between chaos and order. We get access to positive emotion from confronting the chaos and turning it into order through harnessing speech and focused articulation.

This is something that I try to actively practice, especially in highly stressful or overwhelming times. Believe it or not, one great way to practice this is to create checklists. Whenever I feel like a challenge is too much to overcome, I emulate Marduk and chop the great dragon into little actionable tasks. This simplifies the situation, instead of trying to control for all the variables, my task becomes one easy thing — cross things off the list.

I recommend checking out The Checklist Manifesto by Atul Gawande. It’s a beautifully written piece on the hidden (an extremely underrated) powers of checklists. It’s really cool to see how using checklists can completely eradicate mistakes and move projects along faster. He also goes over what makes checklists effective and what makes them more trouble than their worth. Using checklists to practice harnessing speech is so powerful. Just keep in mind that more accurate articulation comes from multiple reps, the first checklists you make aren’t going to be very good.

When it comes to being an effective student, determining what you need to get accomplished or what you need to learn is a fantastic way to practice harnessing speech.

What we say creates who we are. We see this in jobs and our relationships with people. I try to make this known with my students — the only reason they see me as a tutor is that we agree that in the world of conversation, I am a tutor. There is nothing that’s physically different between me and them (except a few neural pathways). I find that this helps them feel like they could learn the material too, despite their failures in the past. It also humanizes me and makes me more relatable. When I’m tutoring I find that things run smoother if my student sees me as similar to them rather than some “math guy” who knows the answer all the time.

Our language plays such a huge role in the world we participate in. I don’t like to write about what people ought to do, but we should treat our powers of speech with respect and use it to build a better place for everyone.

“Life punishes the vague wish and rewards the specific ask.”

Tim Ferriss (1977 – )