Basically, you're better off fulfilling your own Dharma poorly than doing someone else's well. That leads us to Part Four, Samsara, Moksha, and Karma. There are both personal and social reasons for doing your Dharma. But right, the social reason is obvious. Dharma and caste combine for excellent social cohesion. You get the exact right number of bakers and the exact right number of warriors. We could stand to implement this system in the United States, actually, where everyone knows we suffer from a shortage of electrical engineers and a surplus of people who want to be on reality TV shows.