Any time a single philosophy is the “only one”, failure is the outcome. Pure unbridled liberalism leads to anarchy, pure conservatism leads to autotarianism. Pure socialism leads to a hive-mind, pure capitalism leads to feudalism. But the USA is built on a “winner/looser” majority rule political system…so we tend to only see two sides to all issues. There is no room for a third party. The idea of “social democracy” is mostly foreign as our political system has trained us that democracy and socialism are opposites. To us, everything is opposite something and any “middle ground” is just “giving in”.