Ordered by number of conflicts, in decreasing amount:
Tribes > Nation-states > Unions.
There will be more wars when the European Union breaks up. Or when the US does.
Conversely, Africa will greatly benefit from becoming more united in the same way the West has. This is now being reverted (see Trump, Brexit), so you just wait and see where that takes us.
Ordered by number of conflicts, in decreasing amount:
Tribes > Nation-states > Unions.
There will be more wars when the European Union breaks up. Or when the US does.
Conversely, Africa will greatly benefit from becoming more united in the same way the West has. This is now being reverted (see Trump, Brexit), so you just wait and see where that takes us.