Today's the day. It was 2nd August 1776 when the "engrossed" version of the Declaration of Independence was signed. This interview, with author Michael Auslin (Wikipedia here), is among the very best that I've seen in this semiquincentennial year – as is his truly excellent new book, National Treasure: How the Declaration of Independence Made America.
At 53:45 during the Q&A session, he explains the conceptual inspirations such as the 1689 Bill of Rights and also the Bible, quoting President Calvin Coolidge's 150th anniversary address of 1926 (online here). I recommend you watch the whole interview.
There's certainly an argument that the leaders did not see themselves as revolutionaries. They thought they saw themselves as conservators, conservators of the rights as Englishmen that they had that they had exercised in their colonies on this continent for nigh on 160 years or so, 150 plus years by the time of 1776, that the king and parliament in what they called the "great conspiracy" were trying to take away from them. They were not year zero people, they were "this is our inheritance", what they called their "constitutions", their unwritten constitutions of self-government
