• In the long run, the aggressive civilizations destroy themselves, almost always. It's their nature. They can't help it.

  Source: Contact (1985) Ch. 20 (p. 359)

  Carl Sagan
  American astronomer, cosmologist, astrophysicist and author 1934-1996
  

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Subjects in these quotes:

1. civilizations
2. themselves
3. almost
4. always
5. nature

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In the long run, the aggressive civilizations destroy themselves, almost always. It's their nature. They can't help it. by : Carl Sagan

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