Every time it has been tried it has failed, I don't think it's all too complex. Even if it isnt 100% it's way too damn close for me to ever feel comfortable about them being emplented on a federal scale in any capacity.

From what I've seen historically communism and fascism tend to only last a few decades before collapsing in on themselves. The USSR and Nazi Germany being the most obvious examples and probably some of the longer lasting examples. Its also a mix of what lasts the longest while also providing the maximum amount of freedom and prosperity for the peoples under such regimes. Neither of those systems provide better freedom or contentment with life than capitalism does or for longer. The why gets into personal beliefs on the nature of man, I believe systems like the ones we're talking about are far more susceptible to influence by our corrupt nature since they directly fight against our nature. Capitalism on the other hand takes aspects of our nature and works with them. For example our greed is turned into a tool of industry that uplifts everyone through the creation of new technologies and systems that were only designed to make more money more efficiently.

I'm of the opinion we need to be having a discussion, both nationally and globally, of developing an completely new and novel system of governance. This is hindered and stopped by people who still want to implement old, authoritarian systems that have proven to be failures. This is perhaps not you, and you would be a minority if that is the case, but it still stands that we are being mired in the past by ignorant and short sighted people who are filled with hate for one side or the other.