supremacy

noun

1. (uncountable, usually)The quality of being supreme.
2. (uncountable, usually)Power over all others.
3. (in-compounds, uncountable, usually)The ideology that a specified group is superior to others or should have supreme power over them.

   “white supremacy”

   “Fighting a war against Hitler's Nazi ideology, with its doctrine of Aryan supremacy and its "final solution" to protect against an "inferior people," accentuated the final irony of an America fighting a racist ideology while trying to keep its own racist ideology intact.”

4. (in-compounds, uncountable, usually)A state of privilege for a specified group relative to other people in society.