The philosophy of decision reaches its most significant formulations in existentialism and political philosophy. Kierkegaard's "Either/Or" presents decision as the fundamental existential act — the
choice between the aesthetic and the ethical stages of
existence cannot be rationally adjudicated but requires a leap. Schmitt's political concept of sovereignty ("Sovereign is he who decides on the exception") makes decision the foundational political act — the capacity to suspend the normal legal order in a state of emergency is the highest form of political authority. Derrida's analysis of the decision in "The Other Heading" and "The Gift of Death" argues that a genuine decision must pass through the undecidable — if the right answer is obvious,
there is no real decision. Sartre's radical freedom makes every act a decision for which the agent is fully responsible. For poets, decision is both a theme (poems about
choices made and unmade) and a formal principle (every word choice is a decision). Related terms: the leap, existential choice, Schmitt's exception, the undecidable, responsibility, freedom.