There should be approximately 1-5 sovereign governments (one extreme, EU-ism / UN-ism / globalism)
There should be approximately 200 sovereign governments (the moderate position, status quo)
There should be approximately 500 sovereign governments (other extreme, nationalist separatism, localism)
This also closely maps to the pro-diversity and anti-diversity -sides (almost by definition, though not quite tautologically, small states can still be diverse).