mercantilism

an economic system developing during the decay of feudalism to unify and increase the power and especially the monetary wealth of a nation by a strict governmental regulation of the entire national economy usually through policies designed to secure an accumulation of bullion, a favorable balance of trade, the development of agriculture and manufactures, and the establishment of foreign trading monopolies

   
my think the three country around.

Republic

a country that is governed by elected representatives and by an elected leader (such as a president) rather than by a king or queen

This shows all the elected old guys who are making the laws in Rome;  The people voted for them

Feudalism

Feudalism

feu·dal·ism

 noun \ˈfyü-də-ˌli-zəm\

: a social system that existed in Europe during the Middle Ages in which people worked and fought for nobles who gave them protection and the use of land in return

This shows that deferent section of people in back time in Europe 

theocracy

A government that believses in god.

This picture shows Jesus is taking over South Park, like a Theocracy.  If a religiom is the government, it is a theocracy.