The one book every author above has read and was influenced by. Before you read an opinion about the system, read the framework. Still relevent today, not in specific ways but in concept. Some things never change and having his teachings reside in the back of your head will allow you to see through things.
While most of us were forced to read it as part of econ 101, rereading it as an adult and at your leisure makes it a different book entirely.
