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In a nation preoccupied by race, the moment when white Americans will make up less than half the country’s population has become an object of fascination.

For white nationalists, it signifies a kind of doomsday clock counting down to the end of racial and cultural dominance. For progressives who seek an end to Republican power, the year points to inevitable political triumph, when they imagine voters of colour will rise up and hand victories to the Democratic Party.

But many academics have grown increasingly uneasy with the public fixation. They point to recent research demonstrating the data’s power to shape perceptions. Some are questioning the assumptions the Census Bureau is making about race, and whether projecting the U.S. population even makes sense at a time of rapid demographic change when the categories themselves seem to be shifting.

Photo by Gabriella Angotti-Jones/The New York Times

Jennifer Richeson, a social psychologist at Yale University, spotted the risk immediately. As an analyst of group behavior, she knew that group size was a marker of dominance and that a group getting smaller could feel threatened. At first she thought the topic of a declining white majority was too obvious to study.

But she did, together with a colleague, Maureen Craig, a social psychologist at New York University, and they have been talking about the results ever since. Their findings, first published in 2014, showed that white Americans who were randomly assigned to read about the racial shift were more likely to report negative feelings toward racial minorities than those who were not. They were also more likely to support restrictive immigration policies and to say that whites would likely lose status and face discrimination in the future.