Ten Theories of Human Nature compresses into a small space the essence of such thinkers as Plato, Karl Marx, Sigmund Freud, Jean-Paul Sartre, B.F. Skinner, and Konrad Lorenz. Moreover, the authors juxtapose the ideas of these and other thinkers in a way that helps us to understand how humanity has struggled to comprehend its nature.

We see, for instance, how Skinner's theories, which assert the primacy of learned behavior, are undercut by Lorenz's studies of animals, which suggest that complex behavior can occur prior to learning. To bring these comparisons into sharp relief, the book examines each theorist on four points - on the nature of the universe, on the nature of humanity, on the ills of the world, and on the proposed cure for these ills.