https://www.youtube.com/watch?v=hEldsxI0FOE&feature=youtu.be

Civilizations are by definition at their peak when in the process of domestication of undesirables. Eventually this leads to a cultural and moral idiocracy of the populace. Happened with every single "civil"ization throughout the entire history of mankind.

Egyptians (the influence of Christianity and Islam), Greeks (homosexuality and degeneracy), Mesopotamians (overcrowding leading to pollution and drought (same thing is happening to Egypt currently)), Mayans (overpopulation, social unrest and tribal warfare), Aztecs (ritual sacrifices), Chinese Empire (opium trade), Romans (slaves had more rights by the end of the Roman Empire, homosexuality and polyamory were rampant)

The liberals in America and Western Europe are creating corporate slaves of the populace, flooding their countries with biologically unfit individuals (the poorest and stupidest and thus the future of their new countries), and teaching their children that history is irrelevant and nationalism is irrelevant.

Multiculturalism, i.e. "civil"ization is the death of humanity. And ultimately the death of the planet if we assume that the use of thousands of nukes in wartime is an inevitability.

This may be the reason for "The Great Filter" https://en.wikipedia.org/wiki/Great_Filter

Rise and fall. Alternate universes and realities. Same outcomes.