Wouldn't it be interesting if we could reboot humanity and go for a version 2.0? World leaders all agree to eradicate religion as it's no longer relevant in an age where humanity accepts it generates far more harm than good.
If they would all agree the system of individual countries is no longer necessary, as World trade is dictated by technology, which is borderless.
As a result if they then collectively agree to a degree of gradual disarmament.
If we all then accept that in order to cure humanity of its most pressing issues, capping and steadily slowing population growth will mean we can all live sustainably on earth for far longer than is currently likely?
That would all be worth having a go at wouldn't it?