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Originally Posted by combatmedic
Elbow room, BTW, is not really an issue.
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It never is.
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There's plenty of room on Earth.
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There was plenty of room in England in the 17th century, too.
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We could all fit in Texas. The big issues are infrastructure , technology, economic development, and resource use as it relates to population.
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All subsumed into politics, culture, and religion.
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A fraction of the resources needed to terraform other planets could be used to render uninhabitable regions of the globe into verdant lands, to reclaim or build up land as the Dutch have done, to create megacities, and so on.
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That really isn't relevant to whether or not other planets will be colonized.