Mind–body dualism
Ontological dualism makes dual commitments about the nature of existence as it relates to mind and matter, and can be divided into three different types:Substance dualism is a type of dualism most famously defended by René Descartes, which states that there are two kinds of foundation: mental and body. This philosophy states that the mental can exist outside of the body, and the body cannot think. Substance dualism is important historically for having given rise to much thought regarding the famous mind–body problem. Substance dualism is a philosophical position compatible with most theologies which claim that immortal souls occupy an independent realm of existence distinct from that of the physical world.
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 ".