So our alternatives are:
1) A voluntary return to the Stone Age.
2) An involuntary return to the Stone Age.
3) Submission to a new, incorruptible regulatory elite with the power to dictate how we eat, breed, travel and trade. This would need to occur quite soon on a global scale to have any hope of success.
4) Muddle through, in the hope we can find technology fixes sooner than we can completely overhaul human nature.
5) Extinction.