Nation states are adopting protectionist policies, therefore there is no globalisation. If I find protectionism, I can use it as evidence, either way. If I don't find protectionism, I can use that negative finding as evidence - either way. Many apparently solid statistical indicators, can be used as evidence either way. International air traffic is growing, but so are regional airlines.
Cultural evidence is equally double-sided.
The number of published languages has increased, not decreased. So there is no point in detailed argument, about trade volumes, capital flows, and information flow. There is a simple answer to this confusion of logic. Nation states are one of many possible forms of state. The mere fact that there is a world of nation states indicates some form of global order of nation states.