In sociology, postmaterialism is the transformation of individual values from materialist, physical, and economic to new individual values of autonomy and self-expression.
The term was popularized by the political scientist Ronald Inglehart in his 1977 book The Silent Revolution, in which he discovered that the formative affluence experienced by the post-war generations was leading some of them to take their material security for granted and instead place greater importance on non-material goals such as self-expression, autonomy, freedom of speech, gender equality and environmentalism. Inglehart argued that with increasing prosperity, such postmaterial values would gradually increase in the publics of advanced industrial societies through the process of intergenerational replacement.