I disagree. I think the US system with 2 parties is superior to the systems in many other nations where there are multiple parties. The problem with multiple parties is that it is difficult to form a governing coalition. In the US the problem of coalition building simply does not exits (I wonder how many people in the US are even aware of the concept). Basically, the coalition building is done ahead of the elections, by various interest groups aligning themselves with one of the two parties. This alignment is voluntary and dynamic, so the shape of the two parties continuously changes. The debate seems quite polarized and this is indeed a problem. But I think it stems more from the way people's exposure to information has changed with the advent of the internet and social media, and less from how the US organizes its electoral process.