Earlier quoted context omitted.
> I don't see how FPTP prevent the election of Congressional candidates from outside the two major parties. It doesn't prevent it, it just makes it extremely rare. The reason is, essentially, Tragedy of the Commons: for each individual voter, the most strongest result from voting for a minor party candidate rather than the least-opposed major party candidate is to make it more likely that their most-opposed major par…
I appreciate that - I'm familiar with Condorcet's and Arrow's theorems. I'm not a fan of FPTP myself (as I come from a country with proportional representation, and quite like that it's how local elections are run where I live); I just don't think it's deliberately engineered to effectively prevent the formation of other parties, although I certainly agree that it's frequently gamed to that end.
Whether it is "deliberately engineered" to do that or not, it has a fairly well-demonstrated effect of doing that compared to systems which provide more proportional results. Intent is pretty much irrelevant.