America under the sway of the Black Lives Matter movement is reminding me of life in the Soviet Union: One's entire existence is premised on something believed to be untrue. The worst thing about socialism is not empty grocery stores or even the Gulags. The worst thing is harder to represent visually or to pinpoint, but it’s inescapable, and its damage extends for generations. The worst thing about socialism is what being forced to live a lie does to one’s psyche. Save for the few true believers whose numbers dwindle as time passes, virtually everyone experiences this mental toll.By “living...