> Out of curiosity since you made this claim and said you're european, where are the EU vents of frustration that the US lacks?

Proportional representation definitely helps here. You could look at the UK as a good counter-example, where the UKIP (a Brexit supporting party) got like 15% of the votes in the 2015 election, and no seats. Where people see that voting doesn't change anything, they'll look for some other way to effect change.

That being said, PR doesn't really appear to be working that well. I (personally) think that a lot of the issues relate to free flows of capital across the world, which leads businesses to be set up in areas of cheap labour, which makes people in developed countries angry and more likely to vote for anyone who'll promise to fix it (regardless of how insane their ideas are).

But it's complicated, monocausal explanations are typically deceptive.

>Proportional representation definitely helps here.

With this logic doesn't the US have proportional representation as well? Didn't Trump win the popular vote and republicans the senate? The majority of voters won, end of story, and the ones who lost have another chance in 3 years to flip the board. Where exactly is the missing vent valve you were talking about?

>think that a lot of the issues relate to free flows of capital across the world, which leads businesses to be set up in areas of cheap labour, which makes people in developed countries angry and more likely to vote for anyone who'll promise to fix it

Well yeah that's the big issue, but nobody will win the elections by saying they are slaves of the capital class and doesn't matter who you vote for as they are powerless to change the crooked financial system that actually runs the world even if they win the elections since the finance systems globally connected and easily moves to the areas with most stability and tax benefits even if they are undemocratic.