The nation state has never been weaker because it has been defeated by financialization (except in China).
Economics has always played a massive role in our politics.
How did we escape kings and feudalism? International markets opening through technological innovation enabled capital to generate enormous sums of wealth that challenged the old older.
What enabled postwar democracy? The ruling empire, the American, was "democratic", coupled with the destruction of all the wealth of Europe, meaning all the old oligarchs lost a substantial amount of power. Turns out royalists have less power when they don't have the finances to enforce their views.
Political power has also always depended on economic power. And later on, post 1970s, financial power (the private bank's ability to print money for free, something that used to belong solely to the state).
Financial and economic power has totally taken over government power, in many cases in an unholy marriage (as in America). The DMCA, the US forcing its laws down other nation's throats through treaties, etc, were the economic ruling class using the American government to enact their policy decisions for their own benefit.
And now with the internet we are regressing towards feudalism. Apple and Google extract 30% rents from every single mobile software purchase. The lords of old can only dream of such wealth generation through no productive effort of their own. Amazon likewise extracts insane rents from its sellers. Sure, in small pockets, there is resistance, but on a societal scale the commons, the average person, has absolutely been beaten back.