The French system, with its two rounds system has a built-in protection against extremism and to encourage compromise. The UK is also a FPTP system, but has st

The French system, with its two rounds system has a built-in protection against extremism and to encourage compromise. The UK is also a FPTP system, but has strong parties outside of the two main, for instance in the last general election over 42% of people voted for a party other than Labour or the Conservatives. [admittedly that’s an outlier, but looking over the last few elections at least around 20% went to parties outside of the big two]