Supremacy dominates every aspect of our lives, and is key to pretty much all of our struggles, current and historical.
Most of us are not supremacists - it's only a minority of people who actually adhere to this ideology - but those who are seek to control every aspect of society: finance, media, education, religion, etc.
In so doing, they influence our thinking, giving us a sense that their way is the only way in any given situation.
They limit our imaginations to limit our options.