Becoming Human: A Theory of Ontogeny

In this synthesis of nearly three decades of experimental work, Michael Tomasello shifts the focus of human uniqueness from evolutionary history to ontogenetic development. Drawing on comparative studies of chimpanzees, bonobos, and human children, he argues that the distinctively human mind is constructed during the first seven years of life through a process he terms shared intentionality. This framework explains how rudimentary primate abilities in social cognition and communication are transformed into uniquely human capacities for cultural learning, cooperation, and moral identity.

Tomasello identifies three critical developmental stages: the emergence of joint intentionality with caregivers around nine months, the development of collective intentionality with peers and authoritative adults around age three, and the ability to self-regulate behavior according to cultural norms by age six or seven. By integrating Lev Vygotsky’s sociocultural insights with modern evolutionary theory, the book presents a rigorous, data-driven account of how biology creates the conditions for culture to shape human cognition and sociality.

Description adapted from Open Library ↗.