Many of my ideas involve starting over. Not like sticking ten people in a bunker in cyrostasis, then razing the world flat. No, that would never work. A better idea, would be to colonize a new planet. Leave just enough connection that we can trade information, and goods between the two plants, but largely leaving each other alone. Allowing them to grow by themselves, under one flag, so there would be no reason for war. But the main problem, we are human. And as long as we remain human, there will always be strife and war. There will not be any Utopia, as Utopia is ironic. Utopia is described as a wonderful place where everyone is equal and there is no indifference or strife. But, the actual definition of Utopia: "A place that doesn't exist"
Don't get me wrong. Im not saying we can't improve ourselves. But we will never be perfect.