I don't see why DPR would require or support a polarized two party system. The idea is that the secondary (party) ballot allows you to be completely honest and

I don't see why DPR would require or support a polarized two party system. The idea is that the secondary (party) ballot allows you to be completely honest and vote for the party you really prefer, even if that party would be considered a "spoiler" under FPTP. Because the secondary ballots are totalled nationally, there is no danger that your support of a smaller party ends up as a wasted vote. Of course, there are a few extra details to deal with, such as how to include independent candidates (with no party behind them) and whether to introduce a minimum threshold of support for a party to appear on the secondary ballot. These are relatively straightforward questions, though, and are covered by this website about the voting system: http://www.dprvoting.org/ http://www.dprvoting.org/