How are we wired?

We inherit three brain structures from our ancestors. The reptilian brain, the monkey brain, and the human brain. They all work together, and every human baby grows through all three phases.

Reptilian Brain (Brainstem) — the oldest part. Survival. Aggression, dominance, territory, fight-or-flight. It keeps you alive and doesn’t ask permission.

Monkey Brain (Limbic System) — emotions, memory, social bonds. It watches the world, recognizes patterns, forms attachments. This is where you feel before you think.

Human Brain (Neocortex) — the newest layer. Logic, language, abstract thought, planning. This is what lets us build civilizations, write books, and argue about politics.

A baby develops through all three stages. First, the reptile handles survival. Then the monkey wakes up as the child starts interacting with people, feeling emotions, forming memories. The neocortex comes last, growing as the child learns to think, reason, and imagine.

All three layers run at once, handling different jobs. The reptile breathes, the monkey worries, the human plans. You are all three.