Simone de Beauvoir published more than 20 books in a wide range of genres and formats during her lifetime. These range from the seminal study of patriarchy
The Second Sex (1949) to straightforwardly philosophical works like
Pyrrhus and Cineas (1944); novels about her own relationships (
She Came to Stay, 1943) and her intellectual work and political activism during World War Two (
The Mandarins, 1954), among various other themes; biographical works, travelogues, and even a feminist play set in the 14th century,
Who Shall Die (1945). The most important influence on
The Ethics of Ambiguity is Sartre’s seminal work,
Being and Nothingness (1943), in which he lays out his existentialist philosophy in detail. Sartre and de Beauvoir in turn rely heavily on the notoriously complex
Being and Time by Martin Heidegger (1927), often considered the most important philosophical work of the 20th century. Other prominent existentialist works include Maurice Merleau-Ponty’s
Phenomenology of Perception (1945) and Albert Camus’s
The Myth of Sisyphus (1942). De Beauvoir also engages Hegel’s philosophical system, set out primarily in
The Phenomenology of Spirit (1807) and
Encyclopaedia of the Philosophical Sciences (1816/1830); Marx and Engels’ political thought, laid out in various works including Engels’s
Socialism: Utopian and Scientific (1880) and Marx’s commentary on Hegel,
Critique of Hegel’s Philosophy of Right (1843); and Kant’s ethics, which he primarily explicated in the short
Groundwork of the Metaphysics of Morals (1785). In
The Ethics of Ambiguity, de Beauvoir also cites various works of fiction as examples of different ethical attitudes. These include the writings of French fascist Pierre Drieu La Rochelle—including the novel
Gilles (1939) and the short story
The Empty Suitcase (1924)—which, along with Drieu La Rochelle’s eventual suicide, de Beauvoir sees as emblematic of the nihilist attitude; and John Dos Passos’s
The Adventures of a Young Man (1939), from which de Beauvoir takes an important plot point as an example of the kind of difficult ethical choices that political revolutionaries face. In the book, a group of miners are arrested for striking, and their fellow partisans have to decide whether to fight for their liberation or turn them into political pawns in order to create media attention (they pick the former, and—accordingly to de Beauvoir—rightly so).