"Side by side with the miseries of underdevelopment...we find ourselves up against a form of superdevelopment, equally inadmissable. This superdevelopment consists in an excessive availability of material goods for the benefit of certain social groups and makes people slaves of "possession" and immediate gratification, with no other horizon than the multiplication or continual replacement of the things already owned with others still better. This is the civilization of consumption, or "consumerism," which involves so much throwing away and waste."

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This whole issue of limits to growth, which provides a psychological, as well as a physical, cap on potential expansion of activity and awareness, has had a very depressing effect on many people.... I don't for a moment think that there's any concept which anyone's working with now which will be followed as a straightforward scenario. But the idea embodied in concepts such as space colonization or space industrialization, or availability of nonterrestrial resources, is fundamental, and it will change the way in which people look at the future.

— Rusty Schweickart