Humanity will fall long before we can abscond to the stars. Our planet already shifts with this paradigm that is human, The so-christened 'anthropocene', it will leave us for another age/deity; Dionysus or Apollo? A Gaian dream or the Venusian nightmare, whom do we feed? Consuming needlessly, heedlessly, we became enamoured with that consummation, forgetting our own Earth-Mother; We forget nature, we forego any chance to heal the world. Instead we'll let runaway greenhouse effect be the death of our home, we're desecrating Hestia and soon the hearth will burn out and shall be forevermore cold.
Sure doesn't the madgod hunger for an end to his own insanity! Are we not them and they not an aspect of our own reflection?
Carl Sagan said we'd need four things to stop this madness: Efficient use of non-renewables, better use of renewable energy, Reforestation on a grand scale and self-sufficiency for the poor.