“If aliens ever visit us, I think the outcome would be much as when Christopher Columbus first landed in America, which didn’t turn out very well for the Native Americans.” -- Stephen Hawking

The truth, in both theory and practice, is that there is no pure, fair sharing of technology. It always, in nearly every single situation throughout world history, has ended in blood, subjugation, and/or slavery. And, it likely always will.

Cultures don't just switch over to a "more superior" one; they're almost always forced to.

Think of how many people died or were conquered through history just so that we could all be able to flush a toilet and it actually go somewhere. Absurd, but apropos.