The revolutionary change of attitude toward sex within the last two decades has given great impetus to scientific investigation into a subject which had been taboo for centuries. This volume brings together the most modern and enlightened views of men whose knowledge and authority are internationally recognized. Havelock Ellis, Sigmund Freud, Bertrand Russell, C.G. Jung, Franz Boas and Alfred Adler, to name only a few of the contributors, are represented in a symposium as candidly outspoken about sex as it is comprehensive and accurate.