Show me a sustainable non Libertarian city. One that has sustained for thousands of years because it's so great. Governments have been destroying cities, countries, and the people, property, and wealth in them for thousands of years. Maybe it's time to try something different - might work, might not, but I don't think the idea is any less sustainable that what we have currently. And it may be a great opportunity for Bitcoin.
You must be delusional if you think governments are the cause of war and destruction. In fact, the greatest fallacy of right wing libertarian thinking is the tendency to blame governments for everything. War has nothing, absolutely nothing, to do with governments and everything to do with scarcity and profit. Historically scarcity has been the main cause of war, even otherwise peaceful tribes had to go to war occasionally when their territory conflicted with another tribe. In other words, resources and their scarcity is the main cause of war.
In the modern world we have less scarcity but more greed. This has led to wars being started, funded and continued for profit. Someone always profits from war, the weapons industry, construction industry, banks etc. This creates a strong incentive for certain corporations to support war. It's obvious that wars officially happen between governments but it's the forces behind governments that support the war. So yes, governments are to blame, but not alone. The corporations supporting the war effort are just as much to blame. To summarize, it's not fruitful to blame the governments or the corporations alone, the whole system is flawed.
I admit there are other causes for war as well, such as religion and race. But I claim that most wars are actually about resource scarcity or profit, issues such as religion and race are mostly used as a tool to get the masses behind the war effort. There are of course exceptions to this, crusades where it's actually about religion, nothing else. The whole issue is very complex but one thing is for sure, putting the blame on the governments alone is just idiotic. And this applies to many other issues as well.