Foucault's critique of modernity and humanism, along with his proclamation of the "death of man" and development of new perspectives on society, knowledge, discourse, and power, has made him a major source of postmodern thought. Foucault draws upon an anti-Enlightenment tradition that rejects the equation of reason, emancipation, and progress, arguing that an interface between modern forms of power and knowledge has served to create new forms of domination. In a series of historicophilosophical studies, he has attempted to develop and substantiate this theme from various perspectives: psychiatry, medicine, punishment and criminology, the emergence of the human sciences, the formation of various disciplinary apparatuses, and the constitution of the subject. Foucault's project has been to write a "critique of our historical era" (1984: p.42) which problematizes modern forms of knowledge, rationality, social institutions, and subjectivity that seem given and natural but in fact are contingent sociohistorical constructs of power and domination.