“There is a real sense that the parties are further apart on ques­tions of race today than they have been for some time—each side being pulled to the poles. But the truth is more complic­ated. The yawn­ing gap between the parties is not, as is often sugges­ted, because Repub­lic­ans have become more racist and Demo­crats have become more woke; it is because the left has become more progress­ive on racial inequal­ity while the right has forti­fied its pre-exist­ing posi­tion.”