From Wikipedia -- The Ethics Of Ambiguity is Simone de Beauvoir`s second major non-fiction work. It was prompted by a lecture she gave in 1945,[which?] after which she claimed that it was impossible to base an ethical system on her partner Jean-Paul Sartre`s major philosophical work Being and Nothingness (French title: L`Être et le néant). The following year, over a six-month period, she took on the challenge, publishing the resulting text first as installments in Les Temps modernes and then, in November 1947, as a book.

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