Hayek's term for the idea that all institutions in society were or should be "deliberately constructed by somebody"; "constructivists … habitually argue on the assumption of omniscience," rather than acknowledging, as Hayek does, the necessarily limited character of human knowledge in society
who would deny the existence of constructivist projects of desire
the footnote after constructivist refers to Hayek's "The Persistence of Constructivism in Current Thought" in "Law, Legislation, and Liberty"