Exactly - this is why none of the most significant problems facing our world, all of which are fundamentally international in nature, can be solved. The sclerotic institution of the nation state renders solutions, even when entirely obvious, impossible to implement. The current global quasi-civilisation will collapse, as all civilisations eventually do. It will happen this century, leaving behind a comprehensively wasted landscape less hospitable to subsequent large-scale human organisation than earlier collapses.

Homo sapiens was a failed evolutionary experiment. Perhaps some on other planets do rise to the challenge of planetary organisation, but obviously we don't possess the necessary capacities.