Us vs. them and conservatism

"The experience of slavery and its racist aftermath has defined the history of American social movements, and I can't name a time when the reaction against those movements wasn't at the center of American conservatism." The Elephant in The Room: Rick Perlstein on the evolution of the American conservative movement, The Sun, December, 2021, p.11

Editor's Note;

Using a cultural evolutionary model, the conservative movement is stuck at the ethnocentric stage of development which is immature relative to what humanity is capable of and destined for.