I'm more pessimistic, the resources and engineering to support colonies on the moon or Mars are far off, and if the goal is to get the eggs out of one basket, putting up a colony that is completely dependent on Earth for survival doesn't accomplish that, it just makes the current basket even harder to support.
We can hardly keep the ISS going.
If we want to be able to colonize space, first we're going to need robotic technology FAR better than what we have. When we can build a robot factory that can go out and mine an asteroid for resources by itself (including stuff necessary to support life like oxygen and water and such), I think we're wasting our time trying to establish lunar or Mars colonies.
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