62 William James

The mind behind Pragmatism, America’s most important philosophical school.

63 George Marshall

As a general, he organized the American effort in World War II; as a statesman, he rebuilt Western Europe.

64 Jane Addams

The founder of Hull House, she became the secular saint of social work.

65 Henry David Thoreau

The original American dropout, he has inspired seekers of authenticity for 150 years.

66 Elvis Presley

The king of rock and roll. Enough said.

67 P. T. Barnum

The circus impresario’s taste for spectacle paved the way for blockbuster movies and reality TV.

68 James D. Watson

He codiscovered DNA’s double helix, revealing the code of life to scientists and entrepreneurs alike.

69 James Gordon Bennett

As the founding publisher of The New York Herald, he invented the modern American newspaper.

70 Lewis and Clark

They went west to explore, and millions followed in their wake.

71 Noah Webster

He didn’t create American English, but his dictionary defined it.

72 Sam Walton