The long run trend is very obviously toward a single government. Consider that until the Sumerians established cities less than 7000 years ago, humanity was just thousands small traveling groups of nomads with no defined borders.
Sovereignty gets a lot of lip service, but in practice most people don't really want it. It's a lot of work.
Is it? I believe there are far more countries now than 30 years ago.
We seem to have some more powerful international organisations now than a century ago, but earlier than that we had world spanning empires, and Europe was less than 10 countries before WW1.
I want to believe that we're heading towards a star trek like unified post scarcity planet, but I'm unsure we're not just seeing a local trend.
Much how King Arthur, Lord of the Britains was not known to the members of the anarcho-syndicalist commune.
Hmm, I think you will have to justify that statement, rather than simply claim it is a very obvious fact. Generally, there were fewer governments in the past as compared to the modern day.
If the answer is no then your point stands. However I tend to think that the answer is in fact yes and the trend does indeed seem to be toward centralized world government given a long enough time period.
all we need is an event that demonstrates the need for a world government - for eg a massive asteroid headed at earth or a planetary scale food drought to see these systems implemented.
the world is stagnating