Nicky Cheese shed some light on the topic of instant runoff voting in his post yesterday. The video at the bottom of his post is pretty sweet and explains IRV quite well.

IRV allows voters to rank their candidates 1st, 2nd, and 3rd. If no candidate has a majority of the vote, then those who voted for the 3rd most popular candidate have their 2nd-choice candidate receive their ballot.

This concept is hard to explain, but easy to show.

Hypothetical of Georgia in 2008:

Obama gets 48%, McCain gets 46%, Barr gets 6%

Under the current system, Obama would win Georgia and all of its 15 electoral votes.

Under an Instant Runoff system, voters would have already decided which candidate is their 2nd and 3rd choices. Since Barr’s Libertarian Party is ideologically closer to the Republicans, let’s assume that 5% of the voters voted Barr, but put McCain as their 2nd choice and 1% of voters voted Barr, but have Obama as the second option.

This recalculates the vote totals to be: McCain 51%, Obama 49%.

The benefit of Instant Runoff Voting is huge. It allows voters to actually reveal their preferences. Though I am deeply dismayed by many of McCain’s policies and thoughts, I feel that I must vote for him to knock off Obama. If I knew that the vote would go to a run off in the even that neither candidate garnered a majority I would be free to vote for my preferred candidate without the pragmatically political ramifications.

To this end, we can get an accurate and non-damaging look at the popularity of candidates (and their parties). Those Georgians who do vote for Bob Barr risk helping Obama. Those who don’t vote for Bob Barr are denying the Libertarian candidate his rightful support.

While Instant Runoff Voting may seem appealing, it will never get off the ground. The reason is intuitive: Democrats and Republicans lose the most from IRV. They also control every level of government and the bodies which enact the switch to IRV. In a great paradox, the only way to achieve IRV is to outright win elections, which is nearly impossible without IRV.

As I have argued many times, the best way to enact large-scale political change is to use pre-existing political machinery. libertarians (small “l”) need to hijack the GOP and dominate the primaries. If they all voted for Ron Paul in the primaries, Bob Barr wouldn’t be so damn attractive. The Democrats’ support of Obama over Hillary, though the race was close, helps to define their party.