> Another important point is that a lot of our problems here on Earth are entirely self-inflicted (e.g. inequality, pollution, global warming) and so they can't simply be fixed by throwing money at them: they need political transformation.
Yes, but so long as global warming is a threat then the notion of humanity expanding to the stars is a pipe-dream. If the planet becomes incapable of supporting advanced social structures -- or, worse, complex lifeforms whatsoever -- then no one is going to be going anywhere: there will be no one left to travel.
None of that is going to happen anytime soon. Market forces (oil prices are down now, but in the long term they will go back up forcing us to move to cleaner alternatives) as well as the beginning effects of global warming (flooding) will force us to change long before the planet becomes uninhabitable.
I hope so. But honestly, I think we will not be able to stop it. There is too much traction from behaviors that will prevent us from actually doing anything. Preventing it would require us to give up many luxuries and things we call a standard. Greed is too strong. Earth will probably end up like Venus because of us.
Yes, but so long as global warming is a threat then the notion of humanity expanding to the stars is a pipe-dream. If the planet becomes incapable of supporting advanced social structures -- or, worse, complex lifeforms whatsoever -- then no one is going to be going anywhere: there will be no one left to travel.