An exploration of the mind of one of America's most beloved Founding Fathers and most brilliant minds, through the books he read and his social circles in the United States and Europe. Arguably the most intellectual, creative, cosmopolitan, and curious of the Founding Fathers, Benjamin Franklin is the only top-tier Founder not to have served as president. Despite not becoming the Chief Executive, Franklin played an active role in American politics and served the aspiring and young United States in the key European capitals. His prodigious reading and appetite for learning are epic. As he did in works about Thomas Jefferson and George Washington, Kevin J. Hayes interprets the life and mind of Franklin through what he read. 

Undaunted Mind: The Intellectual Life of Benjamin Franklin (Oxford University Press, 2025) tells the story of the development of Franklin's intellect, starting with the earliest books he read as a child before examining his formal schooling and his independent study after his father pulled him from school. As an apprentice in his brother's printing house, Franklin's intellectual life developed through his contact with the Couranteers, the group of his brother's friends who contributed to his newspaper, and through his attention to his brother's excellent office library. After Franklin ran away to Philadelphia, he developed a new group of friends, all of whom loved reading. In many ways, the story of Franklin's intellectual odyssey is the story of the friends he made along the way. His time in London in his late teens introduced him to several important intellectuals who encouraged him to develop his mind. 

After returning to Philadelphia from London, he and some friends formed the Junto, a club for mutual improvement that made reading and writing important activities. With other members of the Junto, he formed the Library Company of Philadelphia, the first subscription library in colonial America. His role as a printer put him in contact with the best eighteenth-century American writing and kept a steady flow of imported books coming from Britain. He became a scientist, assembling a great scientific library, which helped his electrical research. An educational reformer, Franklin founded the Philadelphia Academy, which would become the University of Pennsylvania. As agent for the Pennsylvania Assembly, Franklin lived in London for many years, where he befriended some of Britain's greatest minds. Different concentrations of books in his library reveal Franklin's interests in travel and exploration, warfare, and slavery. His time in Paris toward the end of his life gave Franklin another great intellectual experience, but he ultimately returned home to live the last five years of his life in Philadelphia, where he imparted his knowledge and experience to a new generation of Americans. In this gripping work, Benjamin Franklin is given a biography as rich and complex as his own intellectual life by master literary historian Kevin J. Hayes.

Kevin J. Hayes is Professor Emeritus of English at the University of Central Oklahoma.

Caleb Zakarin is editor of the New Books Network.

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