Benjamin Franklin was one of the most critical Founding Fathers of the United States. He was a leading author, political theorist, politician, printer, scientist, inventor, civic activist, environmentalist, and diplomat. As a scientist he was a major figure in the history of physics for his discoveries and theories regarding electricity. As a political writer and activist he, more than anyone, invented the idea of an American nation, and as a diplomat during the American Revolution, he secured the French alliance that helped to make independence possible.