I'm all for America having multiple parties. But remember, for any execution to happen, for the Government to function, pass laws and stay adaptable, the multiple parties will have to align and agree. To not go to war, the anti-war economic conservative and the Code Pink socialists would have to agree to come together on the issue. The way America is divided, I don't see how this happens easily.

It is difficult even in politically stable countries (see: Liberals and NDP in Canada). However, it is by and large the primary mode of operation for most democratic countries. The largest democracy, India, has 10's (100's?) of federal parties that organically align and dis-align to gain power on wedge issues.