What one change directly helped human groups organize themselves better, understand and adapt to their environment better, and adapt to each other better?

Question

Quizplus · Accepted Answer

Increased quality of diet allowed for humans to have the necessary energy and nutrients to develop their brains, resulting in improved problem-solving skills and the ability to adapt to their environment. This, in turn, led to better organization within human groups and improved communication and understanding between them.

What One Change Directly Helped Human Groups Organize Themselves Better