But instead, they created an entirely new ruling class, a system that some historians call the slave aristocracy. So if you're a king, one of your main problems is hereditary nobles, because they always want to replace you, and they don't want to give you your money, and they want their ugly sons to marry your gorgeous daughters, etc. One way to deal with this problem is to make them part of the government so they feel included and shut up. Another way is to kill them. That's what they usually do in Russia. I'm whispering so Putin doesn't hear me. Ah!