These include behaviorism, constructivism, social learning, and cognitivism. Examples of various approaches are primordialism, essentialism, perennialism, constructivism, modernism, and instrumentalism. He is an outspoken opponent to all kinds of social constructivism and postmodern relativism. Erich Mendelsohn is an exception whose work bordered on Futurism and Constructivism. Malevich's Suprematism is fundamentally opposed to the postrevolutionary positions of Constructivism and materialism. The three most prominent theories are realism, liberalism and constructivism. This approach dovetails with the philosophy known as social constructivism. Social Constructivism and the Philosophy of Technology. Some see a complementarity between realism and constructivism. The term originates from psychology, education, and social constructivism. Intuitionistic logic is a commonly-used tool in developing approaches to constructivism in mathematics. Kraus' relational constructivism can be perceived as a relational consequence of radical constructivism. Relational constructivism can be perceived as a relational consequence of the radical constructivism. Ernst von Glasersfeld was a prominent proponent of radical constructivism. Concept maps have their origin in the learning movement called constructivism.