Anti-foundationalism

Anti-foundationalism (also called nonfoundationalism) is, as the name implies, a term applied to any philosophy which rejects a foundationalist approach, i.e. an anti-foundationalist is one who does not believe that there is some fundamental belief or principle which is the basic ground or foundation of inquiry and knowledge.

Anti-foundationalists use logical or historical or genealogical attacks on foundational concepts (see especially Nietzsche and Foucault), often coupled with alternative methods for justifying and forwarding intellectual inquiry, such as the pragmatic subordination of knowledge to practical action. Foucault dismissed the search for a return to origins as Platonic essentialism, preferring to stress the contingent nature of human practices.

Anti-foundationalists oppose metaphysical methods. Moral and ethical anti-foundationalists are often criticized for moral relativism, but anti-foundationalists often dispute this charge, offering alternative methods of moral thought that they claim do not require foundations. Thus while Charles Taylor accused Foucault of having "no order of human life, or way we are, or human nature, that one can appeal to in order to judge or evaluate between ways of life", Foucault nevertheless insists on the need for continuing ethical enquiry without any universal system to appeal to.

Niklas Luhmann used cybernetics to challenge the role of foundational unities and canonical certainties.

Antifoundationalists oppose totalising visions of social, scientific or historical reality, considering them to lack legitimation, and preferring local narratives instead. No social totality but a multitude of local and concrete practices; "not a history but at best histories". In such neopragmatism, there is no overall truth, merely an ongoing process of better and more fruitful methods of edification. Even our most taken for granted categories for social analysis—of gender, sex, race, and class—are considered by anti-essentialists like Marjorie Garber as social constructs.

...
Wikipedia