Japan China war comes to mind....From a totally materialistic point of view yes
But which of the above country has attacked
Or helped to attack another weak country and has killed millions of women and children in the
Last 100 years
Anyway if a country with majority atheist people does not attack another country for 100 yeare they can be considered moral?
I don't think human civilization will survive 3 more centuries. You need a suicidal lunatic in position of huge power. With enough time it will happen.There is only one true threat to humanity in my opinion, and that is the radicalization of US politics to the point where lunatics like Donald Trump have access to one of the largest nuclear arsenals on the planet. People who would be happy to start a nuclear war as long as they and their families are safely tucked away in nuclear bunkers.