If you altered the game to say that only some fraction of the population get the choice, and everyone who doesn't get the choice is assumed blue (or, is killed if less than 50% of voters choose blue) then there's some question to be explored here. But at it stands there is literally no reason to choose blue.
Press the red button you survive, or press the blue button you might die
Choosing red is choosing to most likely kill yourself.
Choosing blue is choosing to most likely kill yourself.
Depends on the scenario… or the number of people in the experiment. A sufficiently large number of people will guarantee votes in both bins. The specific scenario (reading this outside of a vacuum) will also have knock-on effects.
Eg: reading this into the current political landscape in the US vs reading this into another toy problem about jumping off a cliff or not will have very different outcomes and ethics.
Everyone who voted blue in such a case could think they were the one vote. And they could be right.
Why? To contribute saving the others who chose blue. How isn't that moral?
That isn't to say I categorically judge anyone who would choose red.
If there's good reason to believe a majority and especially a supermajority would choose red over blue, then choosing red is indeed the only rational choice, and convincing overs to do the same is the only way to save lives.
What I like about the question is that it can be used to measure whether a society is low trust (majority red) or high trust (majority blue).
However, where I take issue with the article is the assertion that it's impossible to get a blue majority, especially in the face of polling that suggests such a majority already exists. The article's claim that choosing red is the only moral choice seems at best to be self-delusion.
The utility of choosing red and the morality of convincing others to follow suit maximizes the larger the currently expected pool of red gets, sure. However, while choosing blue has less and less personal downside the greater the expected majority of blue there is, similar to red, the morality of choosing blue maximizes the closer you get to an even split, since it's the product of the potential lives saved by going blue and the likelihood your individual vote will push it over the edge.
Personally, I'd choose blue. I'd rather sacrifice myself than be party to the deaths of billions of people, so if there's even some hope at convincing the majority to go blue, I'd feel obligated to stay with it even if pre-polling suggests things initially tip toward red. I'd also be a bit wary of living in a society now devoid of anyone willing to self-sacrifice. I'm not convinced most people choosing red give that any thought.
Blue is the only moral and logical choice. If red gets over 50% and you picked it, therefore contributing to the "red" outcome, you are now effectively a murderer. Plus you now get to live in a world where everyone else alive are sociopaths that picked red, where everyone with a conscience is now dead.
You also can't count on everyone picking red, or "if you picked blue, then you voted for suicide".
It's reasonable to assume that, leading to the button press event, the usual low-trust, "every man by himself" types will rally for red, with the usual excuses, where high-trust societies will make it clear that it's your moral duty to pick blue, to get the votes to the 50% threshold and ensure no one dies. Around the world there would be debates nonstop that would permeate every social circle and families. You'd have huge arguments where the typical selfish types would scream at their family members "how dare you say you're going to press blue, do you want to leave your poor mother alone without their only child?", only pushing red-leaning voters more into red and blue-leaning voters more into blue.
Plus, if you look at the possible outcomes:
- Red wins, you picked red: Depending on where you live, a reasonable portion to the large majority of the population is now dead. The ones alive have, by definition, a strong bias towards individualism and noncooperation. It's extremely likely civilisation will collapse. Pick your favourite fictional dystopia and you might have a reasonable chance of it actually coming somewhat real.
- Red wins, you picked blue: You are now dead, but at least you don't have to live in the world above.
- Blue wins, you picked blue: Things carry on as normal and your conscience is safe in knowing that you didn't vote to kill and that over 50% of your fellow humans also didn't vote to kill.
- Blue wins, you picked red: Things carry on as normal, but you now have a guilty conscience, or, if your vote was made public, people around you know you would have killed them to save your skin.
Anyone who picked blue gambled their own lives over nothing. There is nothing altruistic about pressing the blue button and especially nothing altruistic about trying to convince people to press the blue button. The altruistic thing is to convince everyone that they don't need to kill themselves by pressing the blue button.
Assuming that the red/blue choice doesn't have a theological valance, you'd have a lot of tight-knit Mormon, Muslim, and Orthodox Jewish communities surviving in the red scenario. I suspect also all the highly authoritarian Asian countries.