If a species has somehow developed the capability to travel through inter-steller space, my guess is they got past any self-destructive tendencies they may have had and evolved beyond petty conflict for the better of their own species' advancement.
I personally think humans have incredible potential as a species. If we could stop fighting over ridiculous things like land, religion and own owns what, we could allocate our resources of energy and knowledge towards a common goal of human evolution/survival. I think this is necessary to go beyond much further than we currently are, when the best minds of the world spend their time inventing new, convenient ways for me to waste my time (phones, game systems, whatever) or trying to find better ways to get a non-renewable resource out of the ground when they could be working on things like solar energy. I mean come on, my phone can access the internet, communicate with anyone in the world, all through sending messages to each other at the speed of light wirelessly. We can drill miles into the ground/ocean, turn the drill sideways, break the ground with water pressure and allow oil to leak out. Im sitting on front of and typing on what would be considered a miracle by people who came less than 30 years before me. We can do all these things, but we can't efficiently harness and store solar energy? Give me a f***ing break. We could do incredible things, but instead our resources and intelligence are wasted on consumer products and increasingly more powerful and easier ways of killing each other.
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