If you notice no other theme from me, it’s that I don’t like declarations from on high that force large amounts of people with no representation to do things that are unsuitable for their area.
There’s different scales of appropriateness at different levels.
So something like a UN or Federal level should be a ‘light touch’ – give guidelines for smaller areas and handle things that are at their own level but allow the maximum breadth of operation for smaller areas and allow some autonomy of the local areas to manage their own affairs.