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Why not get rid of First Past the Post voting, implement Ranked Choice / Alternative voting, and then we won't have to fucking have this conversation at all?
- Why not ...
  Because the powers that be benefit from the status quo too much. Hell, even the Electoral College doesn't do the average person any favours, and that's still going strong
- Let me know when that happens
  
  That's how people feel about the idea proposal in your meme, lol
  ETA I agree the two party is stupid but unfortunately getting "everyone to start voting third party" has never worked every time it's brought up
  
  It's happening now. Some states have implemented a system already and Nevada is voting on it next election.
  
  It is happening in cities around country and some states are starting to look at it

Because you can't get a message out to all 300million people normally, let alone when there are billions of dollars of propaganda working against you is very difficult. Because even if a US 3rd parties were to gain significant power they don't have the institutional knowledge to even keep the lights on, whichever opposition would eat them alive. Because if they did somehow manage to get momentum and take over they would immediately develop the exact same problems of previous political parties because these are systemic problems with your political system.
Why not invest in a strategy that doesn't makes things even worse when you fail. Political reform that would allow 3+ parties to exist are just as big of a long shot as getting a third party elected, but it doesn't split the vote and actually fixes the problem long term.
But hey I'm not an American, I have 5 viable parties to choose from. so you do you.

Can someone please explain? Does the US only have two political parties? That sounds horrendously undemocratic. I know next to nothing about US politics so I may be wrong.
Edit: Also, why is one party called "Democratic" and the other "Republican"? Does this make the Republican party non-democratic? Is this a non-official naming scheme that people created or does seriously only one of them support democracy? Thank you for the answers :)
- Get rid of gerrymandering by forcing convex districts
  Get rid of first past the post
  
  I can't imagine anybody in the US would advocate for the nonsense in the OP above ruthlessly, relentlessly campaigning for this instead.
  It's like they're cosplaying at politics.
- Put simply - we have two parties, both are right wing, and while we have an established way for third parties to gain more proper/fair inclusion in the system (like debate participation, ballot access, in some cases funding) anytime a third party comes close to meeting the requirements the 2 parties mutually agree to raise the bar.
- For all practical purposes yes. It sucks, but as you can see, speaking about third parties gets most people pissed off as it's considered voter suicide / throwing away your vote to vote for an extremely minor third party candidate. The financial support within these two power house parties makes it unlikely this system will ever change. As someone pointed out here, a systematic change like ranked choice voting where third parties could aggregate credit without forcing voters to abandon the two parties they are comfortable with would be the only hope of moving away from the bullshit 2 party system. However, that's not in the interest of the two parties that already run the government, so never going to happen at scale at least.
  
  I fo think that people should vote this way to show the disagreement. Increase in votes to third parties can make more people a bit more confident in voting for them the next time right?
  
  Let’s refine your comment.
  In a majority rules, representative democracy, the peoples’ voice is heard through electing officials that promise to vote on behalf of the constituents.
  This is seen to good effect in the legislative branch, where specific candidates hold office for short terms. But as empirical data suggests, the two party system is still relied upon, especially when it comes to less-than-ideally informed voters.
  When it comes to presidential candidates, who wield far greater power over longer terms, voters are averse to the risk of giant, sweeping changes.
  There have been numerous popular third-party candidates vying for the presidency, but none that sufficiently capture a voter base. So, therefore it is equated to throwing the vote away
  But imo, long live Bernie. I would have voted with my soul

This is an extremely naive take. Most people will vote for the party they have always voted for.

It's not radical at all. It's just ineffectual, unfortunately.
- What if we all wrote in ourselves? That'd be pretty radical, right?
  
  If we all did it, yes. But there's no way we'd get enough people to do it to outweigh all the people who vote party line.

Yeah, why don’t the other 30 million people just change the way they do it?

Because most small parties are ineffectual hobby project clown cart side shows.

How to make sure the fascist wins: get liberals to vote third party.
- How to get a fascist on the ballot in the first place: keep voting for the conservative Democrat.
  
  How to make that relevant again: Get a time machine.
  The fascists are already on the ballot, in case anybody missed that detail.
  I swear, this stuff barely played back when it seemed like an idle concern of the politically inclined. Today it seems entirely detached from reality.
  But hey, by all means, absolutely get the kind of reform that would make this make sense again. I want a world in which this thread doesn't feel like either disingenuous trolling, a conservative psyop or entirely delusional. I want a world where Americans can vote for multiple parties and get proper coalitions and stuff.
  But seriously, until that point, just vote for whoever the Democrat is.

I voted already today, voted for Volt. The tenth party on the ballot.
- Sounds cool.

It's not particularly radical, just betrays some youth. People aren't neeeeeaaaaarrrrly that much alike each other, except at the most fundamental levels. Beyond basic needs though, we branch way the fuck out, in a completely, terrifyingly free world where nobody has to agree with you. Your current probably fully authoritarian parental/educational environment is supposed to insulate you from this until you have better tools for handling it, because it's pretty fucked up sometimes.
You'll just never be able to change that many minds though.
So, what happens first is the spoiler gets just enough votes to swing it for the other guy, and he goes and attacks Iraq, and then Afghanistan. Or probably Mexico this time. And they remember that we attacked them, which does not make them love us more.
So, nobody really wants that. Turns American politics into a giant game of chicken on the highway, which has been the reality for the past couple decades. But we can't just "not play", because the other guys will.
Excellent example of a dilemma.

Go to Europe. You have way more parties here.