meta_pixel
Tapesearch Logo
Log in
CGP Grey

Multiple Party Gerrymandering [Bonus Video]

CGP Grey

CGP Grey

Education

4.9820 Ratings

🗓️ 12 July 2011

⏱️ 4 minutes

🧾️ Download transcript

Summary

Support the videos: http://www.patreon.com/cgpgrey

Visit the website: http://www.cgpgrey.com

Follow CGP Grey: https://twitter.com/cgpgrey

Transcript

Click on a timestamp to play from that location

0:00.0

All right, I wanted to talk a little bit about what happens when you have multiple parties and gerrymandering combined. Just as a quick review, in the main video we had this situation where there are 15 voters, eight of which are buffalo, seven of which are jackaloupe, and depending on how you draw the district, you can get any result that you want. You can either have the buffalo win 4 to 1, or you can get the jackalope win 3 to 2. Now this is not a good situation but it gets worse if you add more political parties. So we're going to add in turtle to the mixture here. I need to make the voting population a little bit bigger to show you the effect. So now we're going to have a 25 member population. There are six turtle voters, nine jackalope voters, and 10 buffalo voters. And you can see on the right-hand side that we have a pie chart showing the overall proportion

0:40.3

of the population.

0:41.3

The best situation that you can get with this group is if you have one turtle district, you get two jackalope districts and two buffalo districts.

0:48.3

And then the percentage of the representatives and the percentage of the voters match pretty closely.

0:53.3

But as you expect,

0:54.3

if you gerrymander these districts around a little bit, you can change the results quite

0:57.8

dramatically. First, we can have Buffalo win an additional seat, so they get a majority in the

1:02.6

house. So they have three districts against Turtles 1 and Jackaloup's 1. You can completely

1:07.7

push the turtles out, so Jackalope gets two representatives and buffalo gets three representatives.

1:13.6

You can set it up so that jackaloupe, who's a minority party, they actually end up getting the majority in the house with three seats to Buffalo's two.

1:21.6

And in the weirdest situation, you can end up getting two turtle representatives to three jackalope representatives.

1:26.6

And Buffalo, who's actually the largest section of the population, they get no representation at all.

1:31.3

I think part of the trouble in actually explaining gerrymandering and plurality voting is because on an individual case-by-case basis,

1:38.3

and each of these districts kind of make sense.

1:40.3

And if we just take a look at one, for example, right? There's three turtle voters, there's two Buffalo voters, so it makes sense.

1:45.0

Well, this district gets a turtle representative. While on a nationwide scale, right, you might not get results that you want. For each individual case, it's kind of hard to argue against. But the situation gets much more complicated if you add more parties. So if we add in guerrilla voters and wolf voters here,

2:01.0

and now this district is no longer a turtle district,

2:03.0

it's now a Buffalo district. complicated if you add more parties. So if we add in guerrilla voters and wolf voters here,

2:01.3

right now this district is no longer a turtle district. It's now a Buffalo district because Buffalo

2:05.3

has the most voters, right? Under first pass the post slash plurality, that's all you need to actually

2:10.2

win. You don't need a majority of the population. You just need the largest number of voters.

2:15.6

But this can quickly lead to some pretty horrifically unrepresentative results. So if we go back to our 25 population,

...

Please login to see the full transcript.

Disclaimer: The podcast and artwork embedded on this page are from CGP Grey, and are the property of its owner and not affiliated with or endorsed by Tapesearch.

Generated transcripts are the property of CGP Grey and are distributed freely under the Fair Use doctrine. Transcripts generated by Tapesearch are not guaranteed to be accurate.

Copyright © Tapesearch 2026.