Graves created an epistemological theory that he hoped would reconcile the various approaches to human nature and questions about psychological maturity.
People-environment studies, originating from environmental psychology (Lewin, Barker, Brunswik), have always tried to close the “mind gaps” between natural sciences, engineering, arts, and social sciences by an epistemological approach that encompasses denotations (objects and techniques) as well as connotations (subjective social, cultural meanings).
His program also made references to ideas the ideas of Lazare Carnot, a "Republican scientist", Jean Jaurès, the only Socialist "with broad ideas" and the only one who "knew Leibniz and the pre-Socratic philosophers", as well as Jean-Baptiste Colbert, who also "understood the epistemological foundations of France".
508–525 in George Steinmetz (editor), The Politics of Method in the Human Sciences: Positivism and its Epistemological Others (Durhman, NC: Duke University Press), 2005
Recent Peirceans, Cheryl Misak, and Robert B. Talisse have attempted to formulate Peirce's theory of truth in a way that improves on Habermas and provides an epistemological conception of deliberative democracy.