The arbiters of appropriate expression in America get very exercised when conservatives call Barack Obama a “socialist.” They treat the claim in the same way as calling Obama a Muslim, Kenyan, or “the anti-Christ.”…

Is “social Darwinist” within some bound of propriety that “socialist” violates? I don’t think so. After all, plenty of people call themselves socialists — not President Obama, to be sure, but estimable figures such as Tony Blair and Sen. Bernie Sanders. Members of the British Labour Party have been known to sing the socialist anthem “The Red Flag” on the floor of Parliament.

But no one calls himself a social Darwinist. Not now, not ever. Not Herbert Spencer. The term is always used to label one’s opponents. In that sense it’s clearly a more abusive term than “socialist,” a term that millions of people have proudly claimed.