DURING THE EARLY months of the Trump administration, I was reminded of a George Orwell essay from 1943 about the civil war in Spain, four years after the fascists won. One subtle but profound effect of the fascist regimes in Spain and Italy and Germany, he wrote, was how their propaganda “often gives me the feeling that the very concept of objective truth is fading out of the world. After all, the chances are that those lies, or at any rate similar lies, will pass into history.”