[Reily]

It was a constitutional monarchy even then. Parliament existed and its members were elected even though the franchise was severely limited. Remember the revolutionary grievances were primarily directed at Parliament, e.g Lord North etc. (Burke and others who were out of Parliamentary power were sympathetic to the colonial cause!)

All in all I think the odds of democracies going to war against each other are much smaller then that of authoritarian regimes (Monarchies, dictatorships etc.) BUT not zero. !

[A. Pole]

It was a constitutional monarchy even then. Parliament existed and its members were elected even though the franchise was severely limited.

Same was with Germany and Austro-Hungary. At the start of WWI the only republics in Europe were France, Switzerland and San Marino.