We went to the Moon, and yet we're still killing each other, or getting rich off of other people's poverty.

Peace on Earth is not going to come from going somewhere else and proclaiming "Look at us!" It's not a side effect.

Or, as the Quakers say, "There is no way to peace. Peace is the way."

It's possible for someone who was not yet alive when the last man left the Moon, to be a grandparent (in a healthy way, e.g. no teen pregnancies). We're two generations removed from having people on the Moon. That's a problem. What if we forget?

If we do forget, maybe that suggests that the Moon wasn't that important in the overall human condition.