C. Wright Mill’s sociological imagination is defined as how individuals understand their own and others' pasts in relation to history and social structure.
Social imagination has greatly helped us in understanding our history beyond the normal boundary. As we compare our pasts to other’s pasts in relation to history, we see a lot of differences in how we live our lives.
An implicit agreement among the members of a society to cooperate for social benefits, for example by sacrificing some individual freedom for state protection. Theories of a social contract became popular in the 16th, 17th, and 18th centuries among theorists such as Thomas Hobbes, John Locke, and Jean-Jacques Rousseau, as a means of explaining the origin of government and the obligations of subjects.
Emile Durkheim, Karl max and Max Weber.
