Merciless criticism and independent thinking are the two necessary traits of revolutionary thinking.

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• Zig Ziglar

  Author

  Saturday, Nov 06, 1926
  Wednesday, Nov 28, 2012

• Peter Drucker

  Author

  Friday, Nov 19, 1909
  Friday, Nov 11, 2005

• Friedrich Nietzsche

  Philologist

  Tuesday, Oct 15, 1844
  Saturday, Aug 25, 1900

• Leonardo Da Vinci

  Painter

  Thursday, Apr 15, 1452
  Friday, May 02, 1519

• Robin Williams

  Actor

  Saturday, Jul 21, 1951
  Monday, Aug 11, 2014

• Billy Graham

  Evangelist

  Thursday, Nov 07, 1918
  

• Carrie Fisher

  Actress

  Sunday, Oct 21, 1956
  Tuesday, Dec 27, 2016

• Vincent Van Gogh

  Painter

  Wednesday, Mar 30, 1853
  Tuesday, Jul 29, 1890

• H. L. Mencken

  Journalist

  Sunday, Sep 12, 1880
  Sunday, Jan 29, 1956

• Michael Jordan

  Basketball Player

  Sunday, Feb 17, 1963
  

• George Carlin

  Comedian

  Wednesday, May 12, 1937
  Sunday, Jun 22, 2008

• Pope Francis

  Thursday, Dec 17, 1936
  

• Stephen Hawking

  Physicist

  Thursday, Jan 08, 1942
  

• Sun Tzu

  Strategist

  Thursday, Jan 01, 1970
  Thursday, Jan 01, 1970

• Abraham Lincoln

  16Th U.S. President

  Sunday, Feb 12, 1809
  Saturday, Apr 15, 1865