So it goes with civilizations. Any given civilization will eventually break up and disintegrate, but the idea of civilization itself continues to progress.
Which doesn't preclude a circumstance where almost no civilization anywhere keeps its sh!t together long enough to send itself to the next star.
Possibly the only solution is to get way smarter by gene editing and preserve as much data as we can from our age.
A Farewell to Alms discusses this in great detail; England began the Industrial Revolution (i.e. broke out of the Malthusian trap) in the late 18th century, but if not for them, the Continent would have done it in the 19th; if not the Continent, then Japan in the late 19th or China sometime in the 20th.
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.
As you may know, chimpanzees wage wars, some being territorial, some more resource-targeted. They even pick fighting grounds, do all kinds of dirty tricks(set traps, prepare stones-to-throw etc) - but to the point. Whenever a "chimp tribe" is threatened, whether its by resource shortage or a competing tribe, they "pick"(as in "tolerate") the most aggressive, asocial, psychopathic chimp of their own to lead them since thats what increases their chances of survival. That chimp may and usually does commit, at wimp, all kinds of atrocities, towards enemies and even his own _but_ when the danger is over, when that tribe no longer competes for their territory, whenever there is enough resources - they simply get rid of him.
We are in a state of prosperity, technologically, environmentally, there is nothing hindering our civilization to live in peace .. except, we are suffering under the same hierarchical [] power-structure we know from medieval(or even much older) periods. Yes, they are still here(structure, not necessarily blood-lines whatever some may want to tell them selves) .. they are not visible, you may not feel their presence, but they are here, creepy version of Asimov's Foundation, there were here all the time(when incl. turbulences within their ranks), now largely consolidated, mostly united, metastasizing across the planet, leading humanity into its abyss, effectively into a 2 species society .. Pharaos as immortal gods, few layers of abstractions(with its own nobelity) and as much slaves as they need for whatever they need, kept in the dark, with no chance to revolt, ever ..
Now I wont be angry when this one gets flagged but I hope at least some of you young minds do get the chance to read and dismiss the claims above .. because they might come handy in the (near) future
It still shocks me that no one person predicted the carnage of the American Civil War. It shocks me even more than in WWI, the Civil War was studied but not applied to the problem at hand.
The generals of the Civil War studied Clausewitz and Napoleon, and the troops went to war with smooth-bore bronze cannon and Napoleonic fire drill. They were largely tempered in the brief, not-too-bloody, and glorious Mexican-American War. It took them a few years and tens of thousands of casualties to learn what havoc accurate, long-range rifles, even if muzzle-loading, could do.
Militaries are eternally building themselves to fight the last war. When they do learn from their experience, quite often the lessons learned are the wrong ones.
The US has always had a charming dread of standing armies.