Carl Sagan Quotes
In the long run, the aggressive civilizations destroy themselves, almost always. It's their nature. They can't help it.
Sagan, Carl. Contact. Simon and Schuster, 1985, p. 274.
Reacting to Franklin Roosevelt taking America off the gold standard:
Carl Edward Sagan was an American astronomer, planetary scientist, cosmologist, astrophysicist, astrobiologist, author, and science communicator. His best known scientific contribution is research on extraterrestrial life, including experimental demonstration of the production of amino acids from basic chemicals by radiation. Sagan assembled the first physical messages sent into space: the Pioneer plaque and the Voyager Golden Record, universal messages intended to be understood by any extraterrestrial intelligence that might find them.