We must extend life beyond this world, if we are to survive as a species. Planet Earth has always had a high opinion of itself, sometimes claiming to be the most advanced of its kind in the known universe & as the only harbinger of intelligent life. It boasts of diverse ecosystems ranging from the polar frigid wastes of Antarctica, to the desert scorching heat of North Africa, but i guess that all changes eventually with the advent of modern technologies. Earth has no longer been regarded that grand position of the only habitable world in this galaxy. It is no question, that in just our local stellar neighborhood of 3.6parsecs, over 4 planets are suspected to have a gravity that can bound an atmosphere of heavy bio-organic gases that could eventually enhance bacterial or probably multicellular evolution. One of these planets called ‘Teegarden b’ is regarded as the most earth-like planet ever discovered, & good news is its just 12 light years away. With an orbital period of 4.91 earth days compared with earth’s 365 days. Meaning only 4 sunrises & sunsets occur in 1 “teegarden b year”. Severe alterations to mammalian circadian rhythms would occur if we ever colonize this world. Surface temperatures have been predicted to be around 0-50°c & maybe closer to 28°c. Although a majority of these worlds found remain at a geosynchronous orbit & are thus tidally locked; causing one side permanently scorched, & the other permanently frozen dark, just like earth’s moon. At these extreme temperatures, one would expect to give up hope of re-settling on them. But, there's a region we call the terminator line, where it'll be possible for water to exist in its liquid state, & perhaps on our arrival we could deploy our modular climate satellites to speed up stratospheric circulation to warm up the frozen side. If we eventually achieve stability on this world, how certain is it that territorial wars & conflicts wont arise, & that we won’t eventually generate excess CO2 & ‘toxify’ the air like we did back on earth, starting that cycle again. In my opinion, I think this universe has resources on an infinite scale, recycling all of it in endless collapses & expansions. Peace & destruction are a dual part of nature; we can’t restrict life to just one planet with the intention of preventing other worlds from being ruined. There remain countless number of earth-like planets out there, & we have a duty to go explore them. “Ruining other worlds” could be more like a little cup out of an ocean that eventually dries up, then refills again with or without any interference.