With the help of illustrations and examples from biology, linguistics and social and cultural phenomena, this book shows that the process of learning is not a means of knowing an absolute world of facts, but is rather an active process which itself creates the world of human experiences. To convey this, the authors examine cognition in all its facets, exploring topics such as the nature of scientific exploration, the organization of living things, evolution, language and the emergence of self-awareness. The authors maintain that the nature of cognition has important social and ethical consequences, for the only world that we humans can have is one that we bring forth together the action of our coexistence. Written for a general audience, this book invites readers to let go of their preconceptions and gain fresh insights into what it means to be human.