About 70 000 years ago, something happened to the human brain.

Humans started to develop "Cognitive Intelligence":

  • Being able to understand a language
  • Being able to understand numbers
  • Being able to understand abstract thinking

Words and Numbers

Using words, was a big step in the development of human intelligence:

"Elephant" is more informative than "Big Animal".

Understanding numbers, was also a big step:

"5" or "50" is more informative than "few" or "many".


"There is a lion behind the big oak" is more informative than shouting "Danger!".

Having a language is probably a key characteristic that distinguishes us from animals.

Abstract Thinking

Abstract thinking is thinking about things that are not concrete, like freedom, or ideas, or concepts.