Space colonization is the establishment of self-sufficient human settlements outside Earth. In particular, effective altruism tends to focus on the possibility of interstellar colonization, the establishment of settlements outside of our solar system.

The feasibility of interstellar colonization has substantial implications for the long-term future.

If it is feasible, then this would raise the upper bound on the number of people who could eventually live by many orders of magnitude. On the other hand, given the Fermi paradox, its feasibility could be taken as evidence that humans are likely to go prematurely extinct....

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