It depends what you mean by "most powerful".
If you mean "most advanced", Communism was the most advanced stage of society posited by Karl Marx and Engels. The progression was from Feudalism to Capitalism to Socialism to Communism.
If by powerful you mean the most influential paradigm and ideology today, it would be capitalism in its neoliberal flavor.
There are different types of government works. Socialism, Communism, Liberal Democracy Capitalism and more government system in the world. You have to be clear that which one you want to know?
Capitalism allows for more freedom for businesses than socialism does
Deng's brand of communism was more economically focused, and much more similar to capitalism than Mao's was. Deng focused on materialism and benefits for peoples work where as Mao relied on the revolutionary enthusiasm and egalitarian policies.
Under capitalism, most people have little freedom of choice, as they have to work for an employer. Socialism will provide much more freedom, without the coercion of the wages system.
Real Socialism would be the transition stage from capitalism to communism that Marx and Engels created and possibly with help from Lenin. Read the area about transition in The communist Manifesto if you want "real socialism". It is not too specific so you might want to go to Communist Party web sites if you want a more specific description.
False, communism when actually employed in government is much more controlling than standard socialism. Communism is an extreme version of socialism. Under communism, private ownership, private property & business ownership is forbidden. Fascism is a less extreme version of socialism. Under Fascism, business & property ownership is allowed but controlled & directed by the government.
Communism is generally regarded to be a more developed form of socialism. Socialism and communism are both based on social ownership of the means of production and social appropriation of the surplus product. From a Marxist analysis, communism becomes technically feasible once productive technology enables superabundance, short work hours, and free distribution of goods and services. Communism can therefore be thought of as an advanced development of socialism.
capitalism
Capitalism is an economic system in which the means of production are privately owned by some while others, the workers, must try to sell their labour to the capitalists in order to survive. The driving force behind capitalism is to accumulate as much capital as possible in order to accumulate even more. Socialism is a term that can be used to refer to any economic system which is based on the common ownership of the means of production and human co-operation in work and society more generally. Communism is often associated with Stalinism though this is far from what Marx, Engels, Lenin, Trotsky and many others meant by the term. Marxism envisions an ongoing process in which a new socio-economic and political system will develop and eventually mature. Socialism here is referred to as the lowest stage of communism and communism as the highest stage of socialism. Communist society will be classless and free of war, poverty, homelessness, illiteracy, racism, sexism, homophobia, etc. The ultimate goal is human happiness and harmony.
Of the three, it is more capitalistic than anything else. France's government is actually a semi-presidential system. Edit: The answer above is actually not true, the main economic system and political system, is based so much on socialism it stands next to Norway. At a socialist point.-
because they are both capitalism. well, china was communism but now it is more like socialist capitalism
Capitalism allows for more freedom for businesses than socialism does