Socialism may be hotter than Kendrick Lamar among undergraduates these days, but socialism isn’t the new new thing. It’s the oldest of old things. It’s older than Bernie Sanders and Grandpa Simpson combined. (Try imagining everything Sanders says in Grandpa Simpson’s voice, especially when he’s railing against the variety of deodorants or shouting that there were banks in post offices half a century ago. It works.) Long before Barack Obama blew the socialist dog whistle in saying, “We are an American family and we rise or fall together as one nation and as one people,” even before Woodrow Wilson said …