Who was the most influential journalist in American history? Some would argue Horace Greeley, for his role in the founding of the Republican Party. Others might say Joseph Pulitzer, in whose name journalism’s highest award is given. Another possibility would be William Randolph Hearst, the model for the titular character in Orson Welles’s famous film Citizen Kane. But a case can be made that it was in fact Henry Robinson Luce (1898–1967), the cofounder and key figure in the development of America’s most dominant newsmagazine, Time.