That's Rationalization my friend.
Hope this helps :D
Answer:
Broadly speaking, a caste system is a process of placing people in occupational groups. It has pervaded several aspects of Indian society for centuries. Rooted in religion and based on a division of labor, the caste system, among other things, dictates the type of occupations a person can pursue and the social interactions that she may have.
War
War times make people very patriotic or nationalistic.
