Since capitalism failed us, do you think America should give socialism a try?

You seem to be a bit confused - you are speaking of pure capitalism which doesn't exist today. None of those countries are pure socialist either as all have large doses of capitalism ingrained. Pure socialism (basically communism or on the national scale, fascism) has never been successful but the early USA was pure capitalist and it was successful and it grew extraordinarily fast.

However, human nature made it problematic in some areas so some socialism was incorporated in the USA. It is still, however, the most successful country in the world and the most closely aligned with liberal western ideology and is still the model for others to emulate if they want to have more success.

America has become the most successful, productive and wealthiest nation in world history in just two centuries from being capitalist and not by being socialist. So you want an example then America is your answer. American Capitalism.

Socialism is counterproductive to the creation of wealth. And by the way, the examples you gave of Socialist countries are mostly mixed economy countries. If they were straight Socialist then they would be utter failures.

I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.