United Planets Voting
Least preferred option tends to win
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GalCiv2 Forums
It'd be nice in cases where there's more than 2 options to vote on (such as voting for freighter minimum speeds and taxes) that after the first vote is done, a second vost is cast with only the winning option and the runner-up option available so that if most want a trade tax but can't agree on a number, it doesn't end up selecting "none".