The document summarizes several influential early management theorists including Sun Tzu, Machiavelli, Thomas Carlyle, Frederick Taylor, George Elton Mayo, Max Weber. It discusses Sun Tzu's book The Art of War and Machiavelli's The Prince. It then covers Thomas Carlyle's "Great Man Theory" and Frederick Taylor's scientific management approach. George Elton Mayo's Hawthorne Studies are summarized which showed the importance of social factors and work groups. Max Weber's principles of bureaucracy are outlined.