We have Proportional Representation single transfereable vote system in Ireland and its great, as it forces formation of coalitions to actually represent a majority of population (hence less alienation), allows small parties and independents to potentially join governing coalition (Greens at moment for example), forces parties to compromise and drop more extreme policies.
As for the left / right divide in USA, from our point of view your two main parties are well on the right wing out there
As for the left / right divide in USA, from our point of view your two main parties are well on the right wing out there