Money isn't the purest form of power, physical force is the purest form of power. Second to that is probably the threat of physical force, then probably the threat of inprisonment, etc. Money is powerful, no doubt though.

I agree we could decide to drop the idea of race. It would be really nice. Humans are always forming out-group hatreds, but it would be very nice if we could not consider another race the out-group. I don't think it's just as simple as just deciding to do away with the idea of race, any more than we could just decide to do away with the idea of money or like, the legitimacy of the court system. Sure, it's a social fiction, but it's self-reinforcing, which means it's hard to coordinate to get rid of.