In the Canadian federal election of 2008, the candidate of Gatineau won with 29% of the votes. Not “the support of 29% of all eligible voters”, but with “29% support of those who voted”.
Recently, I was conveying this fact to a co-worker, and she asked how could this be possible. This is a hint to electoral reform supporters: your audience may not know the rules of plurality voting.
What is plurality?
Plurality: (also known as “simple majority”) the winner is the candidate which has more support than all other candidates. Which doesn’t imply…..
Majority: The winning candidate must have 50% support +1 vote.
In plurality, if there are more than 2 candidates, the winning candidate doesn’t necessarily need majority. They may obtain it, but they won’t necessarily need it to win.
| Number of candidates | Minimum support needed |
|---|---|
| 3 | 1/3rd of votes (33%) |
| 4 | 1/4th of votes (25%) |
| 5 | 1/5th of votes (20%) |
| 6 | 1/6th of votes (16%) |
Most US and Canadian elections pick their winner using plurality as the criteria. In Quebec, where there are now 5 major parties contesting federal elections (Conservatives, Liberal, Bloc, NDP and Greens) a winning candidate could have as little as 20%. In Gatineau in 2008, the winning candidate obtained 29% of the votes.
The good news
The good news is that we can fix this sort of thing by changing the electoral system. We have to work a little, but we can have lots of fun at the same time. Join Fair Vote Canada newsletter or better yet, become a member or a monthly donor (it can be as low as 5$/month).