Benjamin Franklin grew up in a devout Protestant family with limited prospects for wealth and fame. By hard work, limitless curiosity, native intelligence, and luck (what he called “providence”), Franklin became one of Philadelphia’s most prominent leaders, a world-recognized scientist, and the United States’ leading diplomat during the War for Independence. Along the way, Franklin embodied the Protestant ethics and cultural habits he learned and observed as a youth in Puritan Boston. This book follows Franklin’s remarkable career through the lens of the trends and innovations that the Protestant Reformation started (both directly and indirectly) almost two centuries earlier. The Philadelphian’s work as a printer, civic reformer, institution builder, scientist, inventor, writer, self-help dispenser, politician, and statesman was deeply rooted in the culture and outlook that Protestantism nurtured. Through the alternatives to medieval church and society, Protestants built societies and instilled habits of character and mind that allowed figures such as Franklin to build the life that he did. Through it all, Franklin could not assent to all of Protestantism’s doctrines or observe its worship. But for most of his life, he acknowledged his debt to his creator, reveled in the natural world guided by providence, and conducted himself in a way (imperfectly) to merit divine approval. This biography recognizes Franklin as a cultural or non-observant Protestant, someone who thought of himself as a Presbyterian, ordered his life as other Protestants did, sometimes went to worship services, read his Bible, and prayed, but could not go all the way and join a church.