Satanism, as it were, is very much about individualism. The idea that WE human beings are purely responsible for our own selves. We create our own heavens and hells, we exact our own justice, we define our own existance. Some are strong enough to do that, and they shall rule. Others are weak, and they shall be crushed under those stronger than them.
It's a curious philosophy. One that no society could truly hold on to.... humans are too much a pack/herd species. We can't stand alone, our numbers are our only true strength. Besides, to hold to it fully, one would have to refuse to take care of their own offspring, much less anyone else's.
I guess you could call it evil.
