immigration of nonwhite people into societies that have largely been dominated by white people, as well as through simple demographics, with white people having lower birth rates than other populations.The conspiracy theory's more racist adherents believe Jews are behind the so-called replacement plan: White nationalists marching at a Charlottesville, Virginia, rally that turned deadly in 2017 chanted “You will not replace us!” and “Jews will not replace us!”A more mainstream view in the U.S. baselessly suggests Democrats are encouraging immigration from Latin America so more like-minded potential voters replace “traditional” Americans, says Mark Pitcavage, senior research fellow at the Anti-Defamation League Center on Extremism.WHAT ARE THIS CONSPIRACY THEORY'S ORIGINS?How long has racism existed? Broadly speaking, the roots of this “theory” are that deep.