Great Replacement conspiracy theory

The Great Replacement (French: grand remplacement), also known as replacement theory or great replacement theory, is a debunked white nationalist far-right conspiracy theory coined by French author Renaud Camus. Camus's theory states that, with the complicity or cooperation of "replacist" elites, the ethnic French and white European populations are deliberately being replaced by non-white peoples—especially from Muslim-majority countries—through mass migration, demographic growth and a drop in the birth rate of white Europeans.

Source: Wikipedia — Great Replacement conspiracy theory (CC BY-SA 4.0)