Determined - critical summary review

Have you ever looked back at a major decision in your life and felt a surge of pride or perhaps a deep sense of regret?

We are taught from childhood that we are the captains of our souls, the masters of our fate. We believe that when we stand at a crossroads, we possess a magical spark of agency that allows us to choose one path over another.

But what if every single thing you have ever done, from the sandwich you chose for lunch to the person you married, was already written in the stars of your biology and your history?

In this microbook, we are diving deep into the world of Robert Sapolsky, one of the most brilliant neuroscientists of our time. He argues that we are biological machines, and free will is nothing more than a persistent, comforting illusion.

He uses the famous turtles all the way down story to make his point. Legend has it that a woman once told a scientist the world sits on the back of a giant turtle. When asked what the turtle stands on, she replied, another turtle. And below that? It is turtles all the way down.

Sapolsky says your behavior is exactly like that. There is no uncaused cause at the top. There is no point where you step in and decide things independently of the neurons, hormones, and genes that made you.

Accepting this is not just a fun thought experiment for a late-night conversation. It is a total earthquake for how we live.

If there is no free will, then our entire systems of praise, blame, reward, and punishment are built on a lie.

We live in a world that tells you that if you work hard, you deserve success, and if you fail, it is your fault. Sapolsky tears this down.

He shows us that the grit we admire in a chief executive is just as much a product of biology as the height of a basketball player.

When you finish this journey, you will not just see yourself differently. You will see every other human being through a lens of radical compassion.

You will understand that we are all just doing what our machinery dictates.

The goal here is to help you navigate a world without the burden of deserving or blaming.

By the end of these pages, you will understand the seamless chain of prior causes that makes you who you are.

Today, take a moment to look at your hands and realize they are moved by a billion years of history, not by a ghost in the machine.

This is the science of being determined, and it is the key to a truly empathetic future.

The Seamless Chain of Prior Causes

Imagine you are watching a movie. Most of us only pay attention to the final three minutes and then claim we understand the entire plot.

When a person commits a crime or performs a heroic act, we look at their intent in that exact moment. We ask, did they mean to do it?

Sapolsky argues that this is a massive mistake. To understand a behavior, you have to look at what happened a second ago in the brain, but you also have to look at the sensory triggers from minutes before.

Was the person hungry? Was the room hot? Then you look at the hormones from hours or days before. Then you look at their childhood, their time in the womb, and the genes passed down over thousands of years.

It is a seamless chain. There is no gap in this chain where free will can sneak in and change the trajectory.

Neuroscientific studies, like the famous Libet experiments, show that our brains actually initiate a movement before we are even consciously aware that we have decided to move.

Our conscious intent is often just a story our brain tells us after the fact to explain an action that was already in motion.

This biological reality hits a wall when it meets the concept of grit or willpower. We love to forgive people for things they cannot help, like their height, but we judge them harshly for a lack of effort.

Sapolsky shows that willpower is a biological resource, not a moral one.

The prefrontal cortex, the part of the brain that helps us resist impulse, is a machine. Its ability to function depends on its development in the womb, childhood trauma, and even the current level of glucose in your blood.

For example, studies on judges have shown that they are much more likely to grant parole right after they have eaten a meal. When they are hungry, their willpower to be merciful drops because their prefrontal cortex is low on fuel.

They are not choosing to be mean. Their machinery is running low.

To replicate this insight in your own life, stop blaming yourself for weakness on a day when you are tired or stressed. Instead, look at your environment.

If you want to change a habit, do not rely on willpower, which is a finite biological fuel. Change the sensory triggers around you.

Today, stop asking yourself why you did not try harder and start asking what your biology needed in that moment to succeed.

Busting the Loopholes of Chaos and Randomness

When people hear that everything is determined, they often try to find a loophole to save free will. They look at chaos theory, emergence, or quantum physics.

They say, the world is unpredictable, so we must be free.

Sapolsky spends a lot of time addressing these ideas because he wants us to face the truth.

Let us look at chaos theory first. Just because a system is too complex to predict, like the weather, does not mean it is not following strict, deterministic rules.

A hurricane is chaotic, but it does not have a soul or free will. It is just a massive number of variables reacting to each other.

Your brain is the same. It is vastly complex and unpredictable, but it is still a physical system governed by biology. There is no magic in the complexity.

Then there is emergent complexity, like an ant colony. An ant colony can do amazing things that a single ant cannot, but that does not mean the ants have free will. It just means that simple rules can create complex patterns.

We are the same. Our intelligence is an emergent property of our neurons, but those neurons are still determined.

Finally, people often point to quantum physics, hoping that subatomic randomness gives us a way to be free.

But Sapolsky is quick to point out a major problem. Randomness is not the same as agency.

If your actions were determined by the random flip of a subatomic particle, you would not be free. You would be random. You would not be the author of your life. You would be a puppet of a cosmic dice roll.

None of these scientific concepts provide a mechanism for a purposeful you that can stand outside of cause and effect.

This can feel scary, but it is actually liberating. It means the world makes sense. It means that if we want to solve problems like violence or addiction, we need to stop looking for moral failings and start looking for the variables we can change.

Replicate this approach in your organization or family. When a project fails or a child misbehaves, stop looking for someone to blame.

Instead, treat the situation like a scientist. Look for the chaotic variables that led to the outcome and adjust the environment for next time.

Today, accept that unpredictability is just a lack of data, not a sign of a magical soul.

A New Model of Justice and Compassion

If free will does not exist, what do we do with the dangerous people? This is the question that worries most critics.

They fear that without free will, society will descend into anarchy. Sapolsky points out that we have been here before.

We used to burn people with epilepsy because we thought they were possessed by demons. We used to blame bad mothers for causing schizophrenia in their children.

As science progressed, we subtracted free will and replaced it with biology, and the world became more compassionate, not less.

Sapolsky proposes a quarantine model for justice. We do not hate a person with a highly contagious, dangerous disease, but we do quarantine them to keep the public safe.

We should treat dangerous individuals the same way. We contain them to prevent harm, but we do not subject them to retribution or payback because we understand they are the product of luck, biological and environmental luck.

We focus on containment and rehabilitation, not on making them suffer because they deserve it.

The most damaging lie of free will is that people deserve their status in life. This leads to what can be called the meritocracy trap.

Successful people become arrogant, thinking they earned their wealth through sheer grit, while the poor suffer from self-hatred, believing they are failures.

Sapolsky argues that if you were born with a high cognitive capacity, in a stable home, with a healthy prefrontal cortex, you are simply lucky. You did not earn your brain.

Accepting this is the only way to build a truly empathetic society. It allows the successful to be humble and the struggling to be treated with dignity.

To put this into practice today, look at someone you usually judge, maybe a difficult coworker or a person experiencing hardship.

Instead of thinking about their choices, think about the turtles of their history. Ask yourself what biological and environmental chain led them to this moment.

This shift in perspective is the most powerful tool for human kindness we have.

On your next interaction with someone difficult, remind yourself... there but for the grace of biology go I.

This is not just a nice thought. It is the scientific truth of our species.

Final Notes

Sapolsky's microbook is a profound challenge to the way we view ourselves and others.

By accepting that we are biological machines shaped by an infinite chain of prior causes, we can move away from the toxic cycles of blame and pride.

The quarantine model offers a path toward a more humane justice system, and the rejection of meritocracy paves the way for a more empathetic society.

While it is nearly impossible to live every single second as if free will does not exist, even Sapolsky admits he struggles with this, the goal is to use this knowledge to become less judgmental and more effective at solving the real causes of human suffering.

Understanding the machinery of the human brain does not make life less beautiful. It makes our compassion more grounded in reality.

12min Tip!

If you found Sapolsky's deep dive into biology and behavior fascinating, you absolutely must check out his previous work, Behave... The Biology of Humans at Our Best and Worst. While Determined focuses on the philosophy of free will, Behave gives you the full, detailed manual on how the brain and environment interact to create every action we take. It is the perfect scientific foundation for the ideas we discussed here. Look for it on twelve min.