Sartre encountered Marxism concurrently with, not after, existentialism

Evidence

It had shown them that one’s duties to humanity could be more complicated than they seemed. ‘The war really divided my life in two,’ Sartre said later. He had already moved away from some of what he had said in Being and Nothingness, with its individualist conception of freedom. Now, he sought to develop a more Marxist-influenced view of human life as purposeful and social. This was one reason why he never managed to write the follow-up volume on existentialist ethics: his ideas on the subject had changed too much. He did write many draft pages, published after his death as Notebooks for an Ethics, but he could not give them a coherent shape. — Sarah Bakewell, At the Existentialist Café, 525 (#complicates, via linked claim)

Categorization

• XREF: connects to: The war drove Sartre from individualist freedom toward Marxist social determinism — Sarah Bakewell, At the Existentialist Café: Freedom,…, 525

Broader Connections

• The war drove Sartre from individualist freedom toward Marxist social determinism #complicates (0.82) — Sarah Bakewell, At the Existentialist Café, 525