La práctica del mundo industrial de colocar a los niños en clases de edades similares con un maestro adulto no es la única forma de aprender—y puede que no sea la más eficaz—.

The industrial world’s practice of placing children in classes of similar ages with an adult teacher is not the only way to learn—and it might not be the most effective.

The populations of the great apes were once nearly equal. Now, one great ape species—Homo sapiens—outnumbers the rest by almost 8 billion. How did we do it?