Of all the writing that emerged from the existentialist movement, Simone de Beauvoir's groundbreaking study of women will probably have the most extensive and enduring impact. It is at once a work of anthropology and sociology, of biology and psychoanalysis, from the pen of a writer and novelist of penetrating imaginative power. THE SECOND SEX stands, four decades after its first appearance, as the first landmark in the modern feminist upsurge that has transformed perceptions of the social relationship of man and womankind in our time.