"...for each tree is known by its own fruit."
Luke 6:44
Dominic Sandbrook on Triggernometry (
https://youtu.be/kf-bSAnW_E0?) identifies utopian-idealists as the most dangerous leaders. E.g., Hitler, Stalin, Pol Pot.
Christianity at its most eschatological is a bulwark against utopian-idealism.
Original Sin tells us _why we can’t_ build heaven on earth. The Final Judgement tells us _why we don’t have to_ and _why we mustn’t try_. And tradition and authority curb utopian reinterpretation by individuals.
Furthermore, a Christian's primary allegiance is to the City of God. The aim to perfect the Earthly City is secondary, and impossible.
A Christian isn’t encouraged to perfect society, but to transform it in order to restore human dignity and reflect divine mercy. It’s a difficult call - full of paradoxes.
The bad fruits of utopian-idealism are the logical outcome of pursuing a perfect secular society. The bad fruits of Christendom are violations of the principles laid out above.