Early-twentieth-century anthropology inherited a habit from the century before it: ranking cultures on a single ladder, with the observer's own industrial society sitting at the top rung. Lewis Henry Morgan's influential scheme, for instance, sorted human societies into stages labelled "savagery," "barbarism," and "civilisation." Franz Boas and his students set out to dismantle that habit, replacing it with a principle now called cultural relativism: understand a culture's beliefs and practices on its own terms, using that culture's own internal logic, rather than measuring it against an outside society's standard.
Why "primitive" was the word relativism was built to retire
The stage-ranking model treated every society as either behind or ahead on one universal path toward the observer's own way of life, which meant a practice could be dismissed as "primitive" simply for not resembling the industrialised West, without any attempt to understand what function it actually served inside its own social system. Boas argued this was bad method as much as it was arrogant: every culture, he insisted, needed to be studied as an integrated, internally coherent whole, understood from the inside before it was judged from the outside at all.
A tool for research, not automatically a moral position
What Boas was defending is more precisely called methodological relativism — a discipline for research, a deliberate choice to set aside your own standards long enough to understand a practice's internal logic. That's different from moral relativism, the much stronger claim that no culture's values or practices can ever be judged wrong by an outside standard at all. Most working anthropologists accept the first as a basic methodological requirement of the discipline. Far fewer are willing to fully commit to the second.
What we're still unsure about
The gap between those two commitments is a real, unresolved fault line, not an academic technicality. A fully consistent moral relativist struggles to condemn any practice that's internally consistent within its own cultural framework — including practices that cause real, documented harm to people inside that same culture, which is exactly where the position keeps getting tested in practice, in debates that resurface again whenever a specific real-world case forces the question. Anthropologists and philosophers remain genuinely split on how far relativism can be pushed before methodological open-mindedness and personal ethical judgment start to actively conflict, and no version of the principle has fully closed that gap.
This sits inside Cultural Relativism & Ethnocentrism, one of seven topics in Culture, one of four domains in Sociology, one of seventeen subjects the app can quiz you on.