Philosophy of mind
Dualism is a set of views about the relationship between mind and matter (or body). It begins with the claim that mental phenomena are, in some respects, non-physical. One of the earliest known formulations of mind–body dualism was expressed in the eastern Sankhya and Yoga schools of Hindu philosophy (c. 650 BCE), which divided the world into purusha (mind/spirit) and prakriti (material substance). Specifically, the Yoga Sutra of Patanjali presents an analytical approach to the nature of the mind.
Social dualism
In sociology and economics, Social dualism is a theory developed by economist Julius Herman Boeke which characterizes a society in the economic sense by the social spirit, the organisational forms and the technique dominating it. According to Boeke, "These three aspects are interdependent and in this connection typify a society, in this way that a prevailing social spirit and the prevailing forms of organisation and of technique give the society its style, its appearance, so that in their interrelation they may be called the social system, the social style or the social atmosphere of that society ".