Peter L. Berger (born 1929), Austrian-born American sociologist and Lutheran theologian
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Several traditions use the term Social Constructivism: psychology (after Lev Vygotsky), sociology (after Peter Berger and Thomas Luckmann, themselves influenced by Alfred Schütz), sociology of knowledge (David Bloor), sociology of mathematics (Sal Restivo), philosophy of mathematics (Paul Ernest).
This theory, by Peter Berger and Thomas Luckmann in the 1960s suggests that reality is constructed by the society in general, and individually, by the people who interpret and perceive reality.
It developed a discursive version of constructionism in contrast to the more familiar social constructionisms of thinkers such as Peter Berger and Thomas Luckmann.