George Gaylord Simpson

16 June 1902 – 6 October 1984

• Principles of animal taxonomy
• The dechronization of Sam Magruder
• Attending marvels
• Life; an introduction to biology
• Principles of animal taxonomy
• Quantitative zoology
• Splendid Isolation
• Tempo and mode in evolution
• Tempo and mode in evolution
• The major features of evolution
• A new classification of mammals
• Horses, The Story of the Horse Family in the Modern World and Through Sixty Million Years of History