But yeah, the Rus traded slaves. They also relied upon agriculture, and your relationship to the land determined both your social status and your tax burden. And if you ever fell into tax debt, which a lot of peasants did, then you became bonded to the land you farmed for the rest of your life. I guess that slave-like dynamic is okay as a model for social organization, but if you step on the proletariat for too long, you might end up with a communist revolution. But I'm getting way ahead of myself. Couple more things about Kiev. First, the ruler of Kiev was called the Grand Prince, and he became the model for future Russian kings.