Liberty and the Wall of Separation between Church and State

What does it take to bring political liberty into reality and what is required to sustain it? Is religion a necessity or a hindrance? Is religious neutrality in public affairs possible? What do means of persuasion and the knowledge of good and evil have to do with political liberty? Do the well-considered views of the authors of the Declaration of Independence and the Constitution on the separation between church and state have any relevance today?

Such questions are bypassed in the pragmati...