Each nation that has winner-take-all in place will have to find their own methodology. The good news is that there will always be a path. For the USA, I know a pathway already contained in the US Constitution. It's just a small door, but a doorway nevertheless to taking the game out of voting.

But in New Zealand, for instance, the voters just decided themselves that they had had it with the two-party system. In 1996, New Zealand changed their voting system and it brought about good news.

The number of females jumped from 21/100 to 37/120, which translates into a jump of almost 50% more females in the seats in that single new election.

The opposite was visible in San Francisco when At-Large voting (a flawed system still, but incorporating some Equality) got replaced by district voting. The 5/11 Board ended up being a 1/11 Board, almost all females eradicated from the Board.

Of course, the Machine could not bear seeing the flaws of the voting system exposed this badly to equal-minded and equality-loving San Franciscans, so the Democrats fixed it up with every opportunity they got. The new Mayor had his old seat taken in by a woman, and someone else got kicked out because he was registered to live in two places, and replaced by a woman. They hid the fact that the system is flawed rather quickly.

If you want, we can talk more about the Constitutional Invocation that is taking place right now with cities across the USA. If you want, you can join the grassroots movement.