It seems incredibly hard to get right. On the other hand many countries seem to get it less wrong than the US, so maybe that's a good starting point. One thing

It seems incredibly hard to get right. On the other hand many countries seem to get it less wrong than the US, so maybe that's a good starting point. One thing that immediately comes to mind is that first-past-the-post voting systems seem to produce pretty bad results, basically always devolving into a two party system which enables easy us-vs-them rhetoric. And while people love to debate which alternative system is the absolute best, there are many in use around the world that produce better results.