Existentialist ethics condemns tyranny because self-justification requires other men

Evidence

But we have seen that, on the contrary, to the extent that passion, pride, and the spirit of adventure lead to this tyranny and its conflicts, existentialist ethics condems them; and it does so not in the name of an abstract law, but because, if it is true that every project emanates from subjectivity, it is also true that this subjective movement establishes by itself a surpassing of subjectivity. Man can find a justification of his own existence only in the existence of other men. Now, he needs such a justification; there is no escaping it. — Simone de Beauvoir, The Ethics of Ambiguity, 75

Categorization

• DEFINE: Lays out the core derivation of Beauvoir’s ethics: why subjectivity surpasses itself toward others, the basis for condemning the passionate/adventurer types.
• QUESTION: The central question of this reading — is ‘man needs justification’ asserted or argued? This is where she states the premise; track whether it’s actually derived.