Republic is a form of government in which a state is ruled by representatives of the citizen body
Communism. a. A system of government in which the state plans and controls the economy and a single, often authoritarian party holds power, claiming to make progress toward a higher social order in which all goods are equally shared by the people.
socialism. An economic system in which the production and distribution of goods are controlled substantially by the government rather than by private enterprise, and in which cooperation rather than competition guides economic activity.
a system of government by the whole population or all the eligible members of a state, typically through elected representatives.