"The period from 1933 to 1943 was one of the darkest and most chaotic in human history, as the Second World War unfolded with unthinkable cruelty. It was also a crucial decade in the dramatic, intersecting lives of some of history's greatest philosophers. In particular, four women whose parallel ideas would come to dominate the twentieth century--at once in necessary dialogue and striking contrast with one another. Simone de Beauvoir ... was laying the foundations for nothing less than the future of feminism. Born Alissa Rosenbaum in St. Petersburg before emigrating to the US in 1926, Ayn Rand was honing one of the most politically influential voices of the 20th century. ... Hannah Arendt was developing some of today's most important leftwing ideas, culminating with the publication of The Origins of Totalitarianism and her arrival as a peerless intellectual celebrity. Perhaps the greatest thinker of all was a classmate of de Beauvoir: Simone Weil, who turned away from fame to devote herself entirely to refugee aid and the resistance movement during the war"--