In September, 2020, the writer Christopher Rufo appeared on “Tucker Carlson Tonight” to discuss the threat posed by “critical race theory.” Rufo had come across the term while looking into the origins of the anti-racism movement, and saw its potential as a conservative target. In the months since, critical race theory has been condemned by President Trump, outlawed by several state legislatures, and endlessly debated in town halls and school-board meetings. The uproar, largely manufactured by Rufo and amplified by conservative activists in government and in the media, goes hand in hand with the controversies around the Times’ 1619 Project, and with the resistance to the movement to take down Confederate monuments. Benjamin Wallace-Wells, a New Yorker staff writer, joins Dorothy Wickenden to discuss the furor over critical race theory, and how to understand the current rethinking of the country’s past.