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No civilization can possibly survive to an interstellar…

“No civilization can possibly survive to an interstellar spacefaring phase unless it limits its numbers. Any society with a marked population explosion will be forced to devote all its energies and technological skills to feeding and caring for the population on its home planet. This is a very…” quote by Carl Sagan
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““No civilization can possibly survive to an interstellar spacefaring phase unless it limits its numbers. Any society with a marked population explosion will be forced to devote all its energies and technological skills to feeding and caring for the population on its home planet. This is a very powerful conclusion and is in no way based on the idiosyncrasies of a particular civilization. On any planet, no matter what its biology or social system, an exponential increase in population will swallow every resource. Conversely, any civilization that engages in serious interstellar exploration and colonization must have exercised zero population growth or something very close to it for many generations.””

Carl Sagan

About This Quote

This interpretation was drafted with AI assistance. It is one reading of the quote, not the author's own explanation.

Sustainable interstellar travel requires near‑zero population growth; unchecked growth consumes resources and halts space expansion.

In simple terms: To reach the stars, societies must control population size.

Key Takeaway

Prioritize stable population for long‑term progress.

Themes

population sustainability space exploration resource management future planning

Mood

cautionary inspirational

Type

philosophical policy

When to use this quote

  • government policy
  • urban planning
  • colonization strategy
  • resource allocation

Key Concepts

demography ecology technology civilization theory

Questions to Reflect On

  • How can societies balance cultural values with population limits?
  • What incentives encourage sustainable growth?
A Different Perspective

Zero growth may conflict with cultural desires for larger families.

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