^I don't even know where to start, Socrates_Dissatisfied, without throwing mud at you.
First of all, I'm not ignoring the fact he's a flawed man. Tip: so are you, and so am I. I believe there is a general consensus in Great Britain, the country he ran, that he was a valuable asset in fighting nazi-Germany and I guess "general consensus" is vaguely related to "democracy".
We have tried several systems of government properly, I will give you an overview:
1. Absolute Monarchy
Failed during WWI, when the megalomania of individual kings and emperors drove Europe into a war that should never have happened.
2. Fascism
Failed during WWII, ethnic cleansing killed a large and very productive section of the European population and left many others dead. Failed in Japan, pretty much because there was a deadly combination with 1.
3. Communism
Wherever tried, people tried to flee it, that's not a good sign.
4. Theocracy
Iranians are among the most intelligent and productive people of the work and Iran is sitting on a mountain of oil, the country has yet to develop the capacity to refine it and wastes time and energy training islamic extremists in proxy nations.
Thanks for playing, Socrates Dissatisfied.