Pragmatism

"Pragmatism is the philosophy which holds that there is no objective reality or permanent truth, that there are no absolute principles, no valid abstractions, no firm concepts, that anything may be tried by rule-of-thumb, that objectivity consists of collective subjectivism, that whatever people wish to be true, is true, whatever people wish to exist, does exist - provided a consensus says so."

Ayn Rand, Capitalism: The unknown ideal, p.22p