These are two great quotes I serendipitously came across in the same day which I think all progressive comrades should have at their disposal to throw back and right-wingers in certain circumstances.
Right-winger: “If socialism is so great, why hasn’t it become wildly popular?”
“It took us 5000 years to put wheels on luggage”
-William McDonough, “The wisdom of designing Cradle to Cradle”
Right-winger: “socialism is dead” or “socialism failed” or “Marxism is irrelevant”
“Marx is definitely dead for humankind.”
Now this quote in and of itself isn’t such a great response until you mention that it was written by Itallian thinker Croce in the year 1907 — ten years before the Russian Revolution. And Croce wasn’t the first to prematurely dig a grave for Marxism and, as Alan Maass notes, since people are still parroting this line, he clearly hasn’t been the last.