Modern & Contemporary Philosophy

Existentialism emerged most vividly in post-WWII France, through the work of Jean-Paul Sartre (1905–1980), Simone de Beauvoir (1908–1986), and Albert Camus (1913–1960). Its starting point was a radical claim about the nature of human beings: unlike manufactured objects (a paper knife is made to cut paper — its essence precedes its existence), human beings have no predetermined nature or purpose. We are "condemned to be free" — we exist first and then define what we are through our choices.

"Existence precedes essence" is Sartre's defining slogan. There is no God who designed us for a purpose, no human nature that determines what we must be. We are radically free, and this freedom is not a gift but a burden — the source of what Sartre called "anguish" (angoisse). Anguish arises not from fear of punishment but from the recognition that in choosing for yourself you also choose for everyone — you implicitly declare that this is how human beings should act.

Bad faith (mauvaise foi) — Sartre's key concept — is the attempt to escape this freedom by pretending you have a fixed nature that determines your choices. The waiter who performs "waiter" too perfectly, the racist who claims nature made him this way, the lover who says "I couldn't help it" — all are in bad faith. Authenticity, by contrast, means acknowledging your freedom and the responsibility it entails, and choosing genuinely.

Analytic philosophy developed from the logical work of Gottlob Frege (1848–1925) and Bertrand Russell (1872–1970), and from the linguistic turn taken by Wittgenstein in two radically different phases. Its defining commitment is to clarity and rigor — to the idea that many traditional philosophical problems arise from confusions about language and can be dissolved once those confusions are identified.

The early Wittgenstein of the Tractatus Logico-Philosophicus (1921) held that language pictures facts, and that meaningful statements must be either empirically verifiable or tautological. Metaphysical claims that cannot be verified or shown to be tautologies are not false — they are nonsense. This inspired the logical positivists of the Vienna Circle, who used Wittgenstein's ideas to mount a devastating attack on traditional philosophy, theology, and ethics.

The later Wittgenstein of the Philosophical Investigations (1953) reversed course. Language, he now argued, does not picture facts; it performs an enormous variety of activities in specific social contexts — what he called "language games." Philosophical problems arise when we take expressions out of their home contexts and apply them in ways they were never meant to be applied. The task of philosophy is not to construct theories but to describe how language actually works, thereby dissolving the puzzles that arise when it is misused.

Contemporary philosophy has seen the boundaries between analytic and continental traditions blur, new questions rise to prominence (philosophy of mind and consciousness, feminist philosophy, environmental ethics, global justice), and philosophy increasingly engage with the empirical sciences rather than treat itself as their superior. Several developments deserve note.

Philosophy of mind has become the central battleground of analytic philosophy, driven by the "hard problem of consciousness" (David Chalmers): why does any physical process give rise to subjective experience? Functionalism, eliminativism, property dualism, and panpsychism are the major positions, each with serious defenders and serious objections.

Applied ethics — bioethics, environmental ethics, animal ethics, global justice — has emerged as a major area of philosophical practice, with direct implications for law, medicine, and policy. Peter Singer's work on animal liberation and effective altruism exemplifies philosophy that refuses to stay in the academy.

Feminist philosophy has challenged not just specific positions but the implicit assumptions of the tradition — about whose experience counts as "the human condition," whose contributions have been systematically ignored, and how power shapes what questions get asked. Simone de Beauvoir's The Second Sex (1949), which analyzed femininity as a social construction rather than a biological given, is the founding text.