He promised us “Every Day Low Prices,” and we took him up on the offer.

73 Cyrus McCormick

His mechanical reaper spelled the end of traditional farming, and the beginning of industrial agriculture.

74 Brigham Young

What Joseph Smith founded, Young preserved, leading the Mormons to their promised land.

75 George Herman “Babe” Ruth

He saved the national pastime in the wake of the Black Sox scandal—and permanently linked sports and celebrity.

76 Frank Lloyd Wright

America’s most significant architect, he was the archetype of the visionary artist at odds with capitalism.

77 Betty Friedan

She spoke to the discontent of housewives everywhere—and inspired a revolution in gender roles.

78 John Brown

Whether a hero, a fanatic, or both, he provided the spark for the Civil War.

79 Louis Armstrong

His talent and charisma took jazz from the cathouses of Storyville to Broadway, television, and beyond.

80 William Randolph Hearst

The press baron who perfected yellow journalism and helped start the Spanish-American War.

81 Margaret Mead

With Coming of Age in Samoa, she made anthropology relevant—and controversial.

82 George Gallup