I would consider world peace "through mutual respect, tolerance and trust amongst nations" as inherently impossible for homo sapiens as we are. A world peace m

I would consider world peace "through mutual respect, tolerance and trust amongst nations" as inherently impossible for homo sapiens as we are. A world peace might be plausible through a single world government that can enforce a world peace and resolution of diverging interests and conflicts without war, i.e. with some "policing" mechanism instead of relying on people not escalating through sheer goodwill. That is possible - world peace based on the expectation that any potential violators of that world peace would face retaliation and lose in that conflict. Si vis pacem, para bellum - that can work, if it can be established. Or, alternatively, a world peace through mutual respect and tolerance may happen if at some time in future our civilization consists of substantially altered individuals - genetic alteration, chemical brainwashing, computerized circuits in brains, something that changes the way our motivation works on a fundamental level - but not for people as we are. Otherwise, as long as any people and groups of people have unmet desires (not merely needs) and diverging interests, conflicts will happen, and as long as violence is a practical option for achieving goals (i.e. there's not a threat/expectation of successful powerful resistance to that violence) it will be considered and used if mere threat of that violence isn't sufficient.