Earlier quoted context omitted.
Which is great and I would even good as far to say 'noble', but in a political system like the United States, your vote is wasted, because your vote is not proportionally represented in the House of Representatives. It means you face an ever-challenging battle against almost impossible odds in order to get your green or libertarian candidate into the House of Representatives.
your vote is wasted I beg to differ: if enough people vote for candidates who don't affiliate with the Republicans or Democrats, we'll see real change. Every vote counts. Hell, if Republicans and Democrats start seeing 10% of the votes going to greens or libertarians, they'll pay real close attention.
But that's the thing: this will never happen. The current establishment is so firmly entrenched, with so many rich and powerful groups vested in it, that it will find a way to sabotage any upstart.
If you genuinely believe that a third party coming to power in the US is simply a matter of it getting enough votes, I don't know what to tell you. I guess I'm envious: I lost that kind of hope a long time ago.