The power structures of the nation state, like those of free-market capitalism (being intimately linked with each other), are deeply rooted in (European) man's animal nature and behaviour (unsurprisingly, in view of human origins) and thus inherently unsustainable.

 

It was the ruling classes' animal drive for POWER (the most versatile form of which is MONEY, of course) that first unified England under a single crown and went on to create the world's largest empire. But empires are unstable and quickly disintegrate. London's empire is still disintegrating, and will continue to do so, until eventually we create sustainable power structures (social and economic) that are rooted, not in our animal nature, as they are now, but in our more enlightened, human nature.