Is cancel culture coming to free trade?

JEFFREY SONNENFELD is having what he calls a Marshall McLuhan moment—“15 minutes of prominence soon to subside back into obscurity”. That is because, not long after Vladimir Putin sent his troops into Ukraine on February 24th, the 68-year-old professor at the Yale School of Management drew up a list of firms withdrawing from Russia, helping catalyse a stampede out of the country—470 businesses have closed or cut back operations. His…