Hypothesis: In a liberal democracy, when leaders adopts a persona of master morality, the slaves are threatened. If leaders instead project a slave morality, the slaves are peaceable and content. But behind the scenes, it seems like a state needs to rule with master morality, but for peaceableness, promote the adoption of slave morality among the slaves.

Controversial view: Christianity is a perfect ruling tool because it incentivizes slave morality which keeps people peaceful.

Caveat: I'm not saying Christ wasn't real nor an amazing person. Just noting how the religion could be co-opted for ruling purpose.