There are no separate systems. The world is a continuum. Where to draw a boundary around a system depends on the purpose of the discussion.

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• Mother Teresa

  Saint

  Friday, Aug 26, 1910
  Friday, Sep 05, 1997

• Mahatma Gandhi

  Civil Rights Leader

  Saturday, Oct 02, 1869
  Friday, Jan 30, 1948

• Dalai Lama

  Saturday, Jul 06, 1935
  

• Billy Graham

  Professional Wrestler

  Monday, Jun 07, 1943
  

• John F. Kennedy

  35Th U.s. President

  Tuesday, May 29, 1917
  Friday, Nov 22, 1963

• Nelson Mandela

  Former President Of South Africa

  Thursday, Jul 18, 1918
  Thursday, Dec 05, 2013

• Les Brown

  Author

  Saturday, Feb 17, 1945
  

• Oscar Wilde

  Writer

  Monday, Oct 16, 1854
  Friday, Nov 30, 1900

• Jean De La Bruyere

  Wednesday, Aug 16, 1645
  Thursday, May 10, 1696

• George Carlin

  Comedian

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

• Thomas Jefferson

  3Rd US President

  Saturday, Apr 13, 1743
  Tuesday, Jul 04, 1826

• Saint Augustine

  Saint

  Saturday, Nov 13, 0354
  Wednesday, Aug 28, 0430

• Ronald Reagan

  40Th US President

  Monday, Feb 06, 1911
  Saturday, Jun 05, 2004

• John C. Maxwell

  Author

  Thursday, Feb 20, 1947
  

• Marcus Tullius Cicero

  Philosopher