Science Salon

In this fascinating conversation with the evolutionary anthropologist Michael Tomasello, the Max Planck Institute scientist presents his new theory of how humans became such a distinctive species. Other theories focus on evolution. Here, Tomasello proposes a complementary theory of human uniqueness, focused on development. His data-driven model explains how those things that make us most human are constructed during the first years of a child’s life. Tomasello assembles nearly three decades of experimental work with chimpanzees, bonobos, and human children to propose a new framework for psychological growth between birth and seven years of age. He identifies eight pathways that starkly differentiate humans from their closest primate relatives: social cognition, communication, cultural learning, cooperative thinking, collaboration, prosociality, social norms, and moral identity. In each of these, great apes possess rudimentary abilities. But then, Tomasello argues, the maturation of humans’ evolved capacities