"Overpopulation is perhaps the biggest problem facing us, and immigration is part of that problem. It has to be addressed."

You may also like:

• 

  Aldo Leopold
  Author

• 

  Edward Abbey
  Author

• 

  Eliot Porter
  Photographer

• 

  Henry David Thoreau
  Author

• 

  John McPhee
  Writer

• 

  John Muir
  Author

• 

  Paul R. Ehrlich
  Population Biologist

• 

  Robinson Jeffers
  Poet

• 

  Theodore Roosevelt
  26th U.S. President