Entropy
The arrow of time and why order always requires constant energy
Imagine a mirror falling to the floor and shattering into hundreds of pieces. The process feels entirely natural and inevitable. But you have never seen, and will never see, a hundred glass shards on a floor spontaneously jump up and assemble back together into a whole, reflective surface. This fundamental asymmetry in nature is called entropy.
Entropy is governed by the second law of thermodynamics, which states that the amount of disorder in a closed system always increases over time. It is not just a rule for physical particles and heat transfer, but a universal principle that explains why stars die, why hot coffee cools down, why software becomes full of bugs, and why relationships fizzle out if they are not nurtured.
By understanding entropy, you gain a deeper insight into why things require continuous maintenance, why change costs energy, and why perfect structure never arises on its own. It provides a powerful lens through which to navigate both strategic decisions and everyday challenges.
What is it about?
To understand entropy on a deep level, we need to go beyond the simple everyday definition of order and chaos. In the 19th century, Austrian physicist Ludwig Boltzmann showed that entropy is really about probability and the number of possible configurations in a system, so-called microstates.
Imagine a deck of cards. There are only a few ways the cards can be arranged to be in perfect order by suit and rank. At the same time, there are an astronomical number of ways the cards can be arranged where they are completely shuffled. If you throw the deck of cards into the air, the chance of them landing in perfect order is nonexistent—not because nature hates order, but because the number of disordered configurations overwhelms the number of ordered ones.
This is the core of entropy: high entropy means there are a vast number of ways the system's parts can arrange themselves without changing the macroscopic state. Low entropy means the system is extremely specifically arranged. Because random movements constantly nudge particles and components toward more possibilities, closed systems inevitably move from low entropy to high entropy.
In information theory, developed by Claude Shannon, entropy is used to measure uncertainty or information density in a message. The higher the entropy of a data stream, the more random and unpredictable it is, meaning it contains more surprise or disorder. Whether we are talking about gas molecules in a container or bits in a computer, the principle is the same: structured information requires energy to maintain.
Concrete Examples
Practical Use
Understanding entropy changes how you view planning, maintenance, and resource allocation. Since decay is nature's default setting, building a good system once is not enough; you must build in continuous maintenance routines. In organizations, this means you can never expect a new process or structure to last in the long run without active follow-up and an input of energy.
The term negentropy, or negative entropy, is sometimes used to describe the process where living organisms or open systems import energy from the outside to create local order. In your own life, this means you must identify where you need to apply negative entropy. This could involve exercise to prevent physical decline, ongoing conversations to keep relationships from going off track, or regular reviews of your personal finances.
Additionally, the concept of entropy fosters a healthy acceptance of life's setbacks. When things go wrong or get messy, you don't need to see it as a personal failure or a sign of bad luck. It is quite simply thermodynamics at work. Your task is not to stop entropy in the universe, but to create bounded areas of order where it does the most good.
Limitations and Pitfalls
A common trap is misunderstanding the term closed system. Strictly speaking, the second law of thermodynamics applies only to completely closed systems where neither energy nor matter can enter or exit. Earth is not a closed system; we receive a gigantic amount of energy from the sun every second. It is this solar energy that makes it possible for plants to grow, photosynthesis to occur, and life to build complex, low-entropy structures here on Earth.
Likewise, human organizations and societies are open systems. To claim that an organization must perish due to entropy is flawed reasoning, as the organization can continuously bring in new resources, new knowledge, and new energy from the outside to renew itself. Entropy increases on the whole, but locally, order can actually increase significantly if the system is open.
Common Mistakes
A common mistake is confusing entropy with aesthetic disorder or everyday chaos. To a human, a messy desk may look aesthetically cluttered, but from a purely physical perspective, entropy is about microstates and probabilities, not human taste or symmetry.
Another mistake is believing that high entropy is always something bad. In many contexts, high entropy is desirable. When you mix ingredients in a dough, you want high entropy so that the flavor is uniform. In encryption, you want maximum entropy in keys to make them completely unpredictable and impossible to crack.
Finally, many people confuse the cause of entropy with a lack of willpower or poor quality. People are surprised when a well-built house needs a new roof after thirty years or when a well-planned routine stops working. Expecting things to remain orderly without maintenance work is to ignore the universe's most unshakeable law.
The law that entropy always increases holds, I think, the supreme position among the laws of nature. If someone points out that your theory of the universe is in conflict with Maxwell's equations — so much the worse for Maxwell's equations. But if your theory turns out to be against the second law of thermodynamics, I can give you no hope; there is nothing for it but to collapse in deepest humility.
Thinking exercises
Use the exercises to put the chapter into practice. Reflect on each step in your head.
Identifying entropy in your daily life
This exercise helps you recognize where entropy spontaneously increases in your immediate environment.
- Think of a place in your home or workplace that tends to quickly become messy.
- Imagine how many different ways things can be arranged there without it looking tidy.
- Compare that to how few ways things can be arranged when it is perfectly organized.
- Reflect on why it takes conscious energy to maintain that single organized configuration.
The Arrow of Time in Personal Projects
Reflect on how a lack of maintenance affects your long-term goals and projects.
- Choose a project or goal that you have neglected recently.
- Observe what types of disorder or decay have arisen in your absence.
- Identify the minimum amount of energy you would need to apply today to stop the decay.
- Ask yourself what happens if you wait another three months before intervening.
Systemic Entropy and Routines
Analyze how complexity and disorder creep into your daily ways of working.
- Think of a routine or work process in your daily life that has become cumbersome.
- Identify how small changes over time have increased the number of potential sources of error.
- Ask yourself whether it is worth cleaning up the process now or if the decay is costing you more.
- Imagine what the process would look like if you regularly applied a little maintenance energy.
Open vs. Closed Systems
Explore how you can import new energy to restore your own inner order.
- Identify a situation where you feel completely drained of energy and structure.
- Consider yourself as an open system that needs new energy from the outside.
- Reflect on which sources of energy (sleep, diet, relationships, rest) you need to bring in.
- Visualize how this energy input restores your inner clarity and focus.
Information and Noise
Use the concept of entropy to declutter your digital inputs and information flows.
- Think about your inbox or newsfeed on a completely ordinary day.
- Notice how the amount of unprocessed information naturally piles up and creates noise.
- Ask yourself what filter you can apply to reduce the number of possible states.
- Decide what concrete action directly reduces information entropy.
Preventive Maintenance
Learn to plan for continuous efforts before systems crash.
- Think of an important relationship or a physical asset you care about.
- Identify the silent, invisible processes that slowly reduce its quality over time.
- What is the absolute minimum regular effort that counteracts this trend?
- Imagine the long-term gain of constantly applying this small amount of energy.
Summary
Entropy is a measure of disorder and the number of possible states in a system. The second law of thermodynamics shows that order requires energy input while disorder happens spontaneously. Understanding entropy helps us recognize the value of continuous maintenance in everything from physics to organizations.
Read the short daily version in the archive.