Alfred North Whitehead is best known as a philosopher and a mathematician. He achieved recognition as a mathematician in 1910 when he began collaborating with his student, Bertrand Russell, on the three-volume Principia Mathematica (1910-1913). His fame as a philosopher grew more slowly, but by 1925 his philosophy of "organism" was widely recognized as being an outstanding contribution to Western thought. During the period in which he was achieving his reputation as a philosopher, Whitehead was writing and speaking on several other topics, such as education, the history of science, and the history of Western culture. In the latter half of his life, these fields, along with metaphysics, formed his major interests. In educational theory he drew attention to errors in the commonly held views of child psychology, examined the ramifications of those errors, and gave a detailed plan of his own. His theory, applauded by John Dewey, affected the...