• Last week’s mass shooting in Buffalo has drawn renewed attention to a racist conspiracy theory known as “replacement theory.”
  • The theory is often mischaracterized and confused with demographic changes that are happening in the United States.
  • True ‘replacement theory’ posits not just that demographics are changing, but that this change is being orchestrated by a sinister cabal.

A racist mass shooting that left 10 people dead in Buffalo, New York, put national attention on a concept that has alarmed experts in extremism for years: “replacement theory” or the “Great Replacement.”

The attack targeted Black people, and the man charged in the shootings purportedly wrote a hate-filled document nearly 200 pages long, as well as hundreds of pages of a personal diary posted online before the shooting, that cited the conspiracy theory extensively.

The racist belief was the shooter’s primary motivation, according to experts who studied the documents. Authorities worked to definitively link that file to the suspect, Payton Gendron, 18. 

Before and since the attack, political commentators have sparred over what exactly replacement theory is. They debate whether the concept that matured on extremist websites and chat rooms is really the same as the talking points used by mainstream conservative pundits and politicians. 

Understanding this idea, and its connection to hate crimes, requires examination of what replacement theory is – starting with what it is not.

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A makeshift memorial near the scene of a mass shooting at a supermarket in Buffalo, N.Y., honors the victims of an attack being investigated as a racist hate crime.

What replacement theory is NOT

There’s widespread consensus among demographers that the racial and ethnic makeup of the American electorate is changing. It always has. Broadly speaking, if demographic trends continue, experts expect white Americans will become less than the majority of the population toward the middle of this century. 

Legal and illegal immigration, combined with generally higher birthrates among nonwhite U.S. residents, mean that the country is shifting toward an electorate that is majority nonwhite. Demographers at the Brookings Institution used census data to estimate that whites will become less than 50% of the U.S. population around 2045.

Whites will still be the largest single racial group, but they will be outnumbered by nonwhite voters, according to census predictions.

Predictions aside, the fact that demographic change exists in America is not what replacement theory is. 

That involves a further crucial step.

What replacement theory IS

The ingredient that transforms a widely agreed-upon statistical phenomenon into a fallacious conspiracy theory is the assertion that these demographic changes are orchestrated – specifically for political gain. 

According to replacement theory, the changing racial makeup of the country is not a natural or organic process but an organized effort by a powerful and shadowy group. 

For many pushers of this theory, that shadowy group is the Democratic Party and other liberals, assisted by an imagined Jewish cabal, said Marilyn Mayo, a senior research fellow at the Anti-Defamation League’s Center on Extremism.