The white genocide, white extinction, or white replacement conspiracy theory is a white nationalist conspiracy theory that claims there is a deliberate plot (often blamed on Jews) to cause the extinction of white people through forced assimilation, mass immigration, or violent genocide. It purports that this goal is advanced through the promotion of miscegenation, interracial marriage, mass non-white immigration, racial integration, low fertility rates, abortion, pornography, LGBTQ identities, governmental land-confiscation from whites, organised violence, and eliminationism in majority white countries. Under some theories, Black people, non-white Hispanics, East Asians, South Asians, Southeast Asians, and Arabs are blamed for the secret plot, but usually as more fertile immigrants, invaders, or violent aggressors, rather than as the masterminds. A related, but distinct, conspiracy theory is the Great Replacement theory.
White genocide is a political myth based on pseudoscience, pseudohistory, and ethnic hatred, and is driven by a psychological panic often termed "white extinction anxiety". Objectively, white people are not dying out or facing extermination. The purpose of the conspiracy theory is to justify a commitment to a white nationalist agenda in support of calls to violence.