Its a backup plan for humanity, not individual societies or people. There are many things that we can not get a way from however many of earths problems we solv

Its a backup plan for humanity, not individual societies or people. There are many things that we can not get a way from however many of earths problems we solve. Even without climate change or any human made problems, nature could kick us out any time for reasons we don't even know about. Musk has two companies, Plan A, help not destroy earth. Plan B, inspire people and create backup. Bezos doesn't want to go to Mars, he want people living in space and have the earth be a nature park of sorts.