Bert Prelutsky on a common fallacy of the left:
Leftists like to think of themselves as clear-thinking realists who are sensitive to nuance and irony. In reality, they are like little children who regard fairy tales as non-fiction. For instance, they champion socialism even though the past hundred years have proven time and again that it doesn’t work in practice the way it does in theory. On the contrary, in every country where it has existed, it has inevitably led to loss of liberty, widespread poverty and mass murder on a scale that has no parallel in human history. Point out this obvious fact to a liberal, and once he gets done calling you a greedy, heartless, bloodthirsty reactionary, he’ll insist that we haven’t yet seen true socialism. Actually, we have, though. We’ve seen it in the Soviet Union and Nazi Germany, in China, Cambodia, North Korea and Cuba.