In a way nature put all its eggs in one basket, the most complex basket of all, when it evolved humans on Earth. A species made -- evolved -- to be a life carrier species to the universe; if at all possible to keep it from any more mass extinctions. We are a spatial species because we have a spatial mind. We are a space age species. We were made for it, and in two million years we developed for it. From the first tool and product of tooling we've built for it. We are the only Earthly species that can look out and perceive and dream. And that makes us a frontier species to the max. And, that makes us inherently the most dangerous species to one island world that can ever exist. Being essentially the evolved species of all species on Earth, the one basket of all eggs, the most complex and varied and divergent species of all, the most claustrophobic and befouling child of Earth, we weren't designed for Utopia on Earth. We were designed for frontier, which by its very nature is also a designing for conquest, for war. We were designed to birth earth life into the universe or commit species suicide as the only alternative. There is no way nature needs us or wants us, or evolved us, for anything else; any other purpose. It's not our world to perpetuity. This was only our world as a womb world to birth from or be aborted from. A nest to leave or die from restriction, constriction and befoulment,
"Give me liberty or give me death" means something to too many humans. Voluntarily and involuntarily, wittingly and unwittingly, "war of a thousand little cuts" will make Utopia on Earth into Dystopia on Earth, Heaven on Earth into Hell on Earth, and destroy it, and quite probably the species with it. Don't talk, don't even think, "saving the Earth" outside of working to birth and expand life from the Earth. And not to the Moon or Mars, which is the equivalent of 1492CE Europe talking about colonizing Iceland to take care of a continent of population, societal, and economic problems. They aren't nearly enough, not even close. Nor is the entirety of the bodies of the solar system as they naturally are. Only as the looser matter mass resource, including the several moons' resource, even some of the planetary resource, of the solar system can be mined and made into mass colony complex city-states in space, turning inanimate matter mass into animate energy, particularly life activity energy, will there be enough for maybe thousands of years of expansion and growth, by which plentifulness of time, we may have discovered or invented our way to take life out to the next frontier up.