Our Future: Will it be a Space Age or a Stone Age?
"The possible advantages of [space colonization] are many and not to be taken lightly. In theory many of humanity's most environmentally destructive activities could be removed from the biosphere entirely. The population density of the Earth could be reduced, and a high quality of life could be provided to all Homo sapiens. It might even make war obsolete... Environmentalists often accuse politicians of taking too short-term a view of the human predicament. By prematurely rejecting the idea of space colonies they would be making the same mistake."
Paul Ehrlich in Space Colonies, ed. Steward Brand, 1977
Space Quotes to Ponder