Richard Dawkins is the world's most controversial evolutionary biologist. Publication of his 1976 book, "The Selfish Gene," thrust Dawkins into the limelight as the handsome, irascible, human face of scientific reductionism. The book provoked everything from outrage to glee by arguing that natural selection worked its creative powers only through genes, not species or individuals. Humans are merely "gene survival machines," he asserted in the book. Dawkins stuck to his theme but expanded his territory in such subsequent books as "The Blind Watchmaker," "Unweaving the Rainbow" and "Climbing Mount Improbable." His recent work, "The Ancestor's Tale," traces human lineage back through time, stopping to ponder important forks in the evolutionary road. Currently, Dawkins is the Charles Simonyi Professor of the Public Understanding of Science at Oxford University, a position created for him in 1995 by Charles Simonyi, a Microsoft millionaire.