Fundamental contributions to the sociology of mathematical knowledge have been made by Sal Restivo and David Bloor . Restivo draws upon the work of scholars such as Oswald Spengler (The Decline of the West, 1918), Raymond L. Wilder and Lesley A. White, as well as contemporary sociologists of knowledge and science studies scholars. David Bloor draws upon Ludwig Wittgenstein and other contemporary thinkers. They both claim that mathematical knowledge is socially constructed and has irreducible contingent and historical factors woven into it. More recently Paul Ernest has proposed a social constructivist account of mathematical knowledge, drawing on the works of both of these sociologists.
According to the position of leftish thinkers, this principle presupposes the government’s intrusion into people’s life – if there is no such intrusion, the equality isn’t supported. In their opinion, this concept means that every person should have equal possibility irrespective of all the other aspects of his and others’ lives. He may come from any kind of family, receive any education, but still be eligible for the same things that a person who came from a completely different background and was brought up in a completely different way is.