All of nature. If you understand we are just being born as a species, our purpose after that is easy to see. We have spent all our time so far extracting energy, which is obviously very damaging. The rate we've done that damage is the thing extraordinary, our handling of Joules of energy is obviously much greater than nature. But now it looks like we will be assisting putting Joules into Earth, instead of taking them out. There is no reason we will not do this just as fast as we took them out, and after our energy deficit is paid back, carry on adding them with no limit, resulting in a world enriched with far greater energy than could have happened without humans. By that we become part of nature, rather than something the opposite of nature.