Hooton of Harvard again popularizes and universalizes various branches of anthropology and civilization in trenchant, outspoken and dynamic manner. The book brings together various lectures showing primarily the fact that ""devolution proceeds space"" -- that the improvement of man's biology is the one weapon we have to counteract the lethal effect of overmechanization. This is the ""cry havoc"" of the thesis. In addition he goes into the world racial characteristics, with suggested solutions. He shows the change and decay of the American types, the wages of biological sin on physiology. And he makes of it all a readable, invigorating, entertaining book.