Would they always need earth to be habitable?
Because if they somehow managed to terraform and colonise another planet like mars, wouldnt they just make earth so uninhabitable that the rest of us would be forced to go where they are? (Prolly as slaves)
A child can leave Earth without looking back, but not an old man. Jules Pierre Mao might be a titan of the system, but his memories are tied to that rock. That is Earth’s real gravity. - Chrisjen Avasarala.