The Dual Inheritance Theory

The Dual Inheritance Theory explains how human behavior results from two interconnected influences: biological evolution and cultural evolution. Our biological traits, like language or physical features, develop slowly over generations through natural selection. Simultaneously, culture—ideas, customs, skills—are learned and transmitted across individuals and generations more rapidly. These two systems interact, shaping our actions and beliefs. The theory highlights that our behaviors are a product of both our genetic heritage and the cultural environment we grow up in, working together to influence who we are and how we adapt to different societies.