Few figures in modern intellectual life are as polarizing — and as paradoxical — as Sam Harris. As one of the “Four Horsemen” of the New Atheism movement, the perpetually perplexed-looking polemicist burst onto the scene in the mid-2000s.

Kamala Harris appeared on “The Late Show With Stephen Colbert” Thursday night just hours after it was announced she is going to release “107 Days,” a memoir about the 2024 presidential election. In a preview clip from the show, Colbert asked her if ...