Obviously the thought of world governance brings up ideas of tyrants restricting liberties via socialism and communism. What if instead of these systems, a cooperative world government was in place whose only agreed upon role would be to strictly enforce a well written constitution, such as something like the US Constitution?
To me, the main problems would be voter fraud, a federal reserve type monetary system, big tech monopolies and also a sense of complacency amongst communities.
If by some magic (perhaps blockchain technologies) these problems could be fixed, I don't see how a world government, or a world constitution would be a bad thing.
I would love to know others thoughts about this
It would only work in cultures that believed in the rule of not doing undue harm to others. I think many cultures believe this at their core.