Social activities play an important role in the evolution from apes to humans. These activities include social labor and communication between different individuals in the process of labor. Through the lifestyle of picking and hunting, a complex group organization form is established. Individuals in the group have established close social relations of interdependence and division of labor and cooperation, and established increasingly complex social organizations.

At the same time, social activities need language, and language is applied to all aspects of life, gradually developing characters and promoting communication and exchanges between people. At the same time, there is social culture on the basis of language, and the use of language plays a vital role in the evolution of the brain.

In the process of primate evolution, organisms are in an increasingly complex social structure, and the survival experience is accumulated by groups and passed down from generation to generation. The complex individual relationship in the group produces various physiological and psychological experiences, which promotes life's perception and cognition of nature and self.

Through the influence of complex behaviors and social activities, primates gradually distanced themselves from ordinary animals intellectually and embarked on the road to a more advanced life form.

Complex social activities have created human culture, and culture has promoted the formation and development of human wisdom. It took a long time to evolve from primate to human, which is also a process of primate intelligence development, or a process of life's accumulation of nature and self-knowledge. The rapid development of intelligence is the key factor that distinguishes some primates from ordinary animals.