I don't believe there are generally "system" solutions for every problem, particularly in politics. History provides a few examples of particularly effective "systems" in China, the early Ottoman Empire, and the Western Democracies, but most age, decay and became corrupted & ineffective over time. The individual (and highly non-linear) human element is important as well, and, as history amply demonstrates, given enough time, humans find ways of advancing their self-interests in defiance of all systems.
We shall see if the modern "systems" ( such as the EU) fare any better. The chief virtues of our "system" are, in my view, the checks and balances that limit the excesses (both good and bad) of all parties to the process. I believe that one of the chief causes of our current divide is the gradual bureaucratization of our government, and the associated removal of decisions affecting peoples lives from the political process itself. The temper of the people and their representatives in politics today reflects this and several other divides. We have survived worse, but success is not guaranteed to anyone.