This is the document is the article that almost all of modern day, free-market Capitalism is based off of. It was written by the man acknowledged as the founder of free-market Capitalism itself, and it's fundamentals are still carried out in modern Capitalist countries.

This is the document regarded as the manifesto that founded the concept of Communism itself. Though most of what it's core fundamentals are heavily flawed, it gives a rather good perspective on common day Communist countries now.