The Great Replacement of Gentlemen
Much is now made, with good cause, of the Great Replacement. That is, of course, the swamping of the First World by the Third, with predictable consequences. It has led to massive amounts of crime, unbearable demands on the treasuries of civilized countries, disunity, and all the other issues that come with multiculturalism, not the least of which is voting becoming a political war between antagonistic ethnic blocs rather than a productive debate on policy.
While a severe problem, this isn't the first "Great Replacement" to strike the modern West, nor is it the most destructive. Rather than being about demographics, the First Great Replacement, which largely occurred in the last few decades of the 19th Century and the first few of the 20th, was about social position and who was in charge; instead of being about 3rd World and 1st, it was about bean-counter bureaucrats replacing gentlemen and aristocrats as the leaders of most Western societies, with predictable consequences.