Maybe us or other citizens of the West can be happy and enjoy our immensely affluent life styles but the great majority of the population of this planet is far from this level and quite eager to reach it. The planet cannot support that.

Also, humanity's eggs are currently all on one basket - we're one major cataclismic event from complete obliteration.

No, the challenges ahead require us to keep evolving, we cannot afford to stagnate.