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Small-Scale Question Sunday for March 15, 2026

Do you have a dumb question that you're kind of embarrassed to ask in the main thread? Is there something you're just not sure about?

This is your opportunity to ask questions. No question too simple or too silly.

Culture war topics are accepted, and proposals for a better intro post are appreciated.

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How is it that America can be so evenly divided between just two political parties organically and this division persists over decades and decades?

I’ve asked this question a ton of different places to different people at different times and usually no one understands what I’m asking and no one’s ever given me a satisfactory answer so let me over explain what I am trying to ask:

I work in e-commerce (I sell stuff online.) The Pareto principle is always extremely visible in sales results. My top selling item will always outsell the next best selling item, usually by a factor of 2:1 or greater. This also persists over time. Occasionally I come up with a new item that overtakes the previous leader but if it is an evergreen item it will eventually sell so much that it also reaches the 2:1 ratio or better. Basically the most popular item will always win out over time.

I can imagine a business like a coffee shop, where they have like 10 different drinks. The coffee is the most popular item and then matcha and chai are the second and third most popular. The coffee shop could manipulate demand for the chai and matcha seasonally to nudge one more popular than the other. I can imagine being able to change the popularity of secondary tier items that way, but that’s a product of seller manipulation rather than organic customer demand.

Anyway the way party politics work seems like it would be even more difficult to nudge people from one party to the other. And parties are not just two different flavor drinks, they represent actual underlying philosophical choices and plans/theories of actions. How is it that the Pareto principle doesn’t take over and suddenly the majority of Americans agree that one of the parties is correct and now like 70 percent of Americans in all areas only vote for that party and the 30 percent that’s left only vote for the other one and the 70 percent are just left to rule forever? Aren’t there other democracies where things operate in this manner?

I am not insinuating manipulation or conspiracy but my mental model can imagine the even split over decades of a two party system upheld through manipulation but I can’t conceive of it as an organic process. If anyone can explain I’d love to hear it

Oh wow, this explanation does make a lot of sense but has some pretty grim implications for politics if true. The hot dog stand metaphor works when they're selling identical or fungible items, with identical signage/operation and so on. But if there is any difference, people will begin to prefer the slightly better one or the one that fits their needs slightly better. But the major thing that always got me the most confused about the resiliency of the two party situation is that political ideas and policies are not completely identical, or even really fungible, so at some point the underlying ideas and policies of the better team should win out. But since we've seen decades of this not the case it leads me to consider that, like @cjet79 implies below, there are fewer differences between the political parties than we're led to believe.