Discipline: Political Science
Theory of the state as analogous to a natural organism.
The state is better understood as a 'natural' rather than a 'mechanical' phenomenon, with different institutions performing different functions, and the good health of the whole being attributable as much to the good working of the whole as to the contribution of any particular part.
Also see: social Darwinism
Greta Jones, Social Darwinism and English Thought (Brighton, 1980)