The revolutionary period also contained political writings, including those by colonists Samuel Adams, Josiah Quincy, John Dickinson, and Joseph Galloway, a loyalist to the crown. Two key figures were Benjamin Franklin and Thomas Paine. Franklin's Poor Richard's Almanac and The Autobiography of Benjamin Franklin are esteemed works with their wit and influence toward the formation of a budding American identity. Paine's pamphlet Common Sense and The American Crisis writings are seen as playing a key role in influencing the political tone of the time.
During the revolution itself, poems and songs such as "Yankee Doodle" and "Nathan Hale" were popular. Major satirists included John Trumbull and Francis Hopkinson. Philip Morin Freneau also wrote poems about the war's course.
During the 18th century, writing shifted focus from the Puritanical ideals of Winthrop and Bradford to the power of the human mind and rational thought. The belief that human and natural occurrences were messages from God no longer fit with the new human centered world. Many intellectuals believed that the human mind could comprehend the universe through the laws of physics as described by Isaac Newton. One of these was Cotton Mather. The first book published in North America that promoted Newton and natural theology was Mather's The Christian Philosopher (1721). The enormous scientific, economic, social, and philosophical, changes of the 18th century, called the Enlightenment, impacted the authority of clergyman and scripture, making way for democratic principles. The increase in population helped account for the greater diversity of opinion in religious and political life as seen in the literature of this time. In 1670, the population of the colonies numbered approximately 111,000. Thirty years later it was more than 250,000. By 1760, it reached 1,600,000.[1] The growth of communities and therefore social life led people to become more interested in the progress of individuals and their shared experience on the colonies. These new ideals are accounted for in the widespread popularity of Benjamin Franklin's Autobiography.