altrui

Altruism is a philosophical coinage by Auguste Comte (1798–1857), the French positivist philosopher who founded sociology as a discipline and coined the term 'sociology' itself. Comte formed 'altruisme' in the 1830s and 1840s from the Italian altrui, meaning 'of others, belonging to others,' which derives from Latin alteri ('to the other') via the ablative form of alter ('the other'). The word was designed as the conceptual opposite of 'egoism' — Comte was trying to name a principle of living for others rather than for oneself, a moral orientation that took others' welfare as its primary object. The coinage was deliberate and polemical: Comte was arguing against what he saw as the dominant moral philosophy of his era, the utilitarian egoism that treated individual self-interest as the only genuine motive for action and then tried to derive social cooperation from its aggregation.

The English naturalist and essayist Herbert Spencer adopted Comte's term into English in 1853, and Charles Darwin used it in The Descent of Man (1871) when discussing the evolution of social instincts. Darwin's question was precisely whether altruistic behavior — apparent sacrifice of individual fitness for the benefit of others — could arise through natural selection, which operates on individual reproductive success. The apparent paradox of evolved altruism occupied evolutionary biology through the twentieth century: William Hamilton's theory of kin selection (1964), Robert Trivers's reciprocal altruism (1971), and E. O. Wilson's sociobiology all attempted to show how behaviors that appeared to reduce individual fitness could evolve because they enhanced the reproductive success of genetic relatives or long-term social partners. The philosophical word that Comte coined against egoism became a central term in evolutionary biology's attempt to derive cooperation from competition.

In moral philosophy, the question of altruism's possibility runs from Plato through Kant to modern debates in moral psychology. The Kantian tradition insists that genuinely moral action is action done out of duty rather than inclination — to act altruistically for the warm feeling of benevolence is not morally worthy action but a form of refined selfishness. Thomas Nagel's The Possibility of Altruism (1970) is the most rigorous twentieth-century attempt to show that purely other-regarding action is both conceivable and rationally required — that practical reason itself, when extended to its full scope, demands that we treat others' interests as objective reasons for action, not merely as stimuli to our own sympathetic responses.

Effective altruism, the movement that emerged in the early 2010s associated with philosophers Peter Singer and Will MacAskill, attempted to give altruism a rigorous practical framework: if one is going to act for others' benefit, one should act as effectively as possible, donating to causes with the highest expected return per dollar in lives improved or saved, thinking globally rather than locally, and treating moral obligations to distant strangers as equivalent to obligations to those nearby. This 'altruism' was more Benthamite than Comtean in its logic — maximizing welfare rather than simply orienting toward others — and it generated both extraordinary generosity and considerable controversy when its frameworks were applied to animal welfare, existential risk, and the systematic comparison of different causes' moral value.