After bipedalism and encephalization,what was the most important evolutionary milestone for the human species?

Question

Quizplus · Accepted Answer

While tool use and weaponry were important developments for early humans, language was the most significant milestone. Language allowed for communication, culture, and the transmission of knowledge and ideas between generations. It also allowed for the organization of social groups and the development of complex societies.

After Bipedalism and Encephalization,what Was the Most Important Evolutionary Milestone