They masses only choose between the ideologies developed by the intellectual leaders of mankind. But the masses' choice is final and determines the course of events. If they prefer bad doctrines, nothing can prevent disaster.
Historically, Europeans had few qualms about conquering and enslaving other Europeans. This presents some problems for the narrative claiming that injustices committed by Europeans are motivated primarily by racism.
In a slave economy, slave owners seek technological innovations that make slave labor more productive. But they also place inefficient and artificial limits on innovations that might change the established social order.
Because the rich generally save and invest more of their income than the less wealthy, they are the primary builders of the pool of available capital. Taxing away their incomes means less capital for everyone.