IMHO, the US and China’s hurry to expand into every possible corner is unsustainable. Unless we are actually trying to get ready to face an extraterrestrial threat, our endless effort to maximize our tech and become more and more efficient and profitable is unneeded and puts too much stress on earthlings, which is definitely not sustainable. Do you really believe that when we are able to pass production of almost anything to AI and robots and give generous UBI to each and every person, they will be happy and satisfied? It is a dead end, a loss of meaning that we are racing to reach ASAP.

Population collapse cannot be a good enough reason, either. Older people won't be happier if their servants are robots instead of climate migrants.