The "brilliance" of the caste system is what Ambedkhar characterized as its inherent "graded inequality."

In Nepal, the gradation can be found not just between the five castes, but also between the ethnic groups, between communities that make up an ethnic group, within communities and therefore between individuals.

And because social status is valued so much, the gradation has determined who you could marry and form a familial alliance with, which in turn dictates who you socialize with the most. Were inter-caste marriage the norm, the caste system would break down.

In Nepal's brand of groupism, the most important and valuable functional unit is the extended family. That and following the dictates of the caste system means that we live and move within small social bubbles. Who one forms alliances with -- such as marries, works, socializes with etc. -- depends a lot on ones ethnicity and caste. It's as if like we are still tribes living in the hunter-gatherer phase of human evolution!