Only one set of policies able to produce sustainable scenario in Limits to Growth: The 30 Year Update:

  1. stable population – this requires all couples decide to limit their family size, AND
  2. stable industrial output per person – if the wealthiers say “enough” and willing to share their wealth with impoverished people so that the total industrial output can be stabilized while no one is impoverished (otherwise people will riot), AND
  3. technology advance to improve pollution abatement effectiveness, best sustainable agricultural practise and resource consumption efficiency.

Now the challenge is: How can we implement this set of policies in advance before the effects of overshoot take place (“too late”)?

This is the most challenging question, but if we can find out a way to answer it, we will be the first generation in the human history that able to control our future.