I'd say the opposite is true. World government may become a dictatorship (you can see the process in Turkey, Poland and the US) and the only viable individual a

I'd say the opposite is true. World government may become a dictatorship (you can see the process in Turkey, Poland and the US) and the only viable individual action against a dictatorship is voting with your feet. If you don't have somewhere to go to, you're f'ed. As the article mentions - it's not a coincidence that the most innovative and prosperous states in the past were city states (Athens, Florence, Venice, Genoa, the German states later on, ...) because they had to be nice to their citizens, otherwise they'd just move that 30 km away. In a way, many small states resemble a rich supply of "states" where you can live in. Having a world government is asking for a power monopoly and you know how these tend to behave.