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).
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Friedrich Kratochwil: Constructivism: what it is (not) and how it matters, in Donattela Della Porta & Michael Keating (eds.) 2008, Approaches and Methodologies in the Social Sciences: A Pluralist Perspective, Cambridge University Press, 80-98.
Elaborating upon Giambattista Vico, Jean Piaget's genetic epistemology, Bishop Berkeley's theory of perception, James Joyce's Finnegans Wake, and other important texts, von Glasersfeld developed his model of Radical Constructivism, which is an ethos shared by all of these writers to one degree or another.