> Median Voter theory [...] political parties take positions that appeal to the median voter That only seems to work in voting systems with proportional repre

> Median Voter theory [...] political parties take positions that appeal to the median voter That only seems to work in voting systems with proportional representation (as opposed to first past the post systems). The latter seem to promote polarization, and this alone seems to explain a lot of the differences between the US/UK and countries with proportional-representative systems.