The accumulating conflict with Great Britain had led to armed revolution at Lexington and Concord. In addition, other forces had joined since the middle of the century to add strength to the revolutionary movement. One vital force was the further development and extension of libertarian thought in America. It was the general concepts of liberty and revolution that found expression in the specific revolutionary arguments against Great Britain.
Source link: http://archive.mises.org/5937/conceived-in-liberty-volume-3/