When a diffusion comes along it usually causes diversity between the people who diffused it.
example:
john : i hate this culture!
jane : shut ur mouth !
john : this needs diversity !
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.
When President Obama made this statement about transparency and the rule of law he was stating that His cabinet's policies will be based strictly on regulation and also that no person in his administration would be above the laws governing all citizens.
If the government never had separate the power into three branches the government would've been anarchy government who would be greedy to share his powers to the citizens and he would ignore the concern of the citizens.