Federalist92 said:
Scandanavia and the UK - Monachy
North America - Capitalist
South America - A Senate
Asia - Socialist
Europe - Mixed Federation with bits of Capitalism and Socialism.
Middle East - Theocracy
Australasia - Anarchist/Free society
I'm mean this with the minimum insult possible but you're either grossly ignorant or incredibly stupid.
You've list a mixture of government types and economic systems, and one political institution for good measure. What is 'A Senate' supposed to mean in terms of government? You can't have one or the other, a country is defined by both - a Capitalist Democracy, a Socialist Theocracy, etc etc.
Monarchy and Theocracy are governmental systems. The first doesn't exist in any form other than a superficial nod and the second is the most repressive form of governance. Neither indicate the economic system the country would operate under. Anarchy is true capitalism in that there is no government to restrict corporate power and as such would mean rule by companies.
Socialism and Capitalism are the two extremes that 99% of all countries find themselves in the scale of. Even China has capitalist elements and even the USA has a social welfare system. A country cannot be exclusively be defined by its economic system because it leaves out sovereignty.
Actual governance is a minor element in whether or not states go to war. The only thing I can think of is to point you towards the Democratic Peace Thesis which postulates that Western Democracies do not go to war therefore in order to create peace you must convert the world into stable democracies.