
Revised

"A fascinating monograph on the conditions of human evolution and the conditions required by it . . . .This is first-rate scientific speculation -- lucid and straightforward." -The New Yorker "This is an excellent analysis, and though it goes to the heart of issues in genetics...

"A fascinating monograph on the conditions of human evolution and the conditions required by it . . . .This is first-rate scientific speculation -- lucid and straightforward." -The New Yorker "This is an excellent analysis, and though it goes to the heart of issues in genetics...


"A fascinating monograph on the conditions of human evolution and the conditions required by it . . . .This is first-rate scientific speculation -- lucid and straightforward." -The New Yorker "This is an excellent analysis, and though it goes to the heart of issues in genetics...