How did symbols and language transform human social life according to theories of cultural evolution?

According to theories of cultural evolution, the emergence of the ability to symbol—specifically through articulate speech and symbolic representation—was a revolutionary development that transformed primate social life into human existence.1

The Transformative Power of Symbolism

The introduction of symboling added a new dimension to human life, allowing individuals to imbue the world with meanings that cannot be comprehended by the senses alone. This shift fundamentally altered social structures:1
* Redefinition of Relationships: Social interactions were transformed into moral obligations, duties, rights, and privileges; for example, mating became marriage, and kinship ties gained new social significance.1
* Meaning and Value: Objects and natural phenomena were no longer merely functional; an axe could become a symbol of authority, and the natural world became imbued with inward meaning and conscious spirits.1
* Social Cooperation: Language, as a system of arbitrary vocal symbols, enabled humans to cooperate, make plans, and coordinate complex social, political, and economic systems.23

Language and Cognitive Evolution

The recursive properties of language allow humans to combine arbitrary concepts in indefinitely many ways, making the range of human thought virtually unlimited. While language serves as a primary tool for communication, it also functions as a means of thought itself, with human rationality developing alongside the capacity for symbolic communication.32

Ultimately, culture—a man-made environment of language, beliefs, and tools—functions as an external system that promotes the security and continuity of human society. By enabling the transmission of knowledge across generations, this symbolic environment allows humans to navigate their world with a level of complexity and social cohesion distinct from other species.12