In "Benjamin Franklin: An American Life," Walter Isaacson explores Franklin's character traits and contributions that shaped his legacy. Franklin is portrayed as a figure who valued reason and nature, advocating for a balanced understanding of the world. His social consciousness is evident in his efforts to improve society, emphasizing the importance of community and collaboration. His progressive views set him apart as a forward-thinking individual who championed enlightenment ideals.

Franklin's cosmopolitan nature is highlighted through his interactions with various cultures, reflecting a broad-minded and tolerant perspective. His approach to philanthropy is described as somewhat bland, yet he made significant efforts to support the welfare of others and promote societal improvement. Overall, Isaacson illustrates Franklin as a multifaceted individual whose diverse qualities contributed to the formation of American identity and ideals.