On the one hand, I’m with Edgar (King Lear): “The worst is not so long as we can say ‘This is the worst!’”
On the other hand, I’m with Orwell: “Nourished for hundreds of years on a literature in which right invariably triumphs in the last chapter, we believe half-instinctively that evil always defeats itself in the long run. Pacifism, for instance, is founded largely on this belief. Don’t resist evil, and it will somehow destroy itself. But why should it? What evidence is there that it does?”
@chrkrhc Evil defeats itself because good works together, and evil cannot sustain that in the long term. We do have proof. Evolution creates altruism over and over. Chemicals working together. Cells working together. Organs working together. Organisms working together. Societies working together. It's not perfect, and defectors perpetually re-emerge, but they cannot last in the face of altruism.
But we have to remember why it works: It's because altruistic beings *work* together. We cannot sit back and expect it to happen on its own.