There is a nice series of YouTube videos on this topic on the C.G.P. Grey Explains channel. One specifically illustrates why the first-past-the-post system ine

There is a nice series of YouTube videos on this topic on the C.G.P. Grey Explains channel. One specifically illustrates why the first-past-the-post system inevitably becomes a two-party system: http://youtu.be/s7tWHJfhiyo http://youtu.be/s7tWHJfhiyo You can then click through to other videos on topics such as alternative voting systems, gerrymandering, and the electoral college.