The older I get, the more it strikes me that civilization is inherently unstable. It may be metastable, in the way that a predator-prey relationship is stable. A technological civilization like ours is not stable. It's a conflagration . It's subject to a number of exponential processes. Our economy is based on exponentiation. If progress is based on war, then that's just another nail in the coffin. This makes for a p…
Latest example: Why go to a different planet? Personally, just for the heck of it. The financial problem is entirely artificial, because much larger sums than what Musk is talking about are being played with all the time. This amount of money could be in anybody's pocket tomorrow should the right people feel so inclined (say a couple very wealthy persons taking a fancy). I want to go for the heck of it because fascinating things can, and most probably will, come out of it. What exactly, I have no idea. It's the simple act of doing something new because, why not? What else is there to do except keep bashing each others' heads in?
This is extremely hard to convey to somebody who wasn't born with, wasn't taught, or whose sense of adventure was ripped out in the course of growing up.
My point is, humanity's many civilizations' instability caused by war is an artifact of evolution. Throughout mankind's history, bashing your foe's head in was the best way to survive, and humanity has yet to overcome this rather primitive and impulsive behaviour.
On a side note, not every species survives by war, but by symbiosis.