If my doctor told me I had only six minutes to live, I wouldn't brood. I'd type a little faster. - Isaac Asimov

Human beings, in terraforming a world, leave out the thorns and thistles, whatever they may be, and human beings then have to labor to keep the world going. It isn't a self-supporting organism as Gaia is. It is rather a miscellaneous collection of Isolates and the collection isn't miscellaneous enough to allow the ecological balance to persist indefinitely. If humanity disappears, and if its guiding hands are removed, the world's pattern of life inevitably begins to fall apart. The planet unterraforms itself.

The Jews continued to be suspicious of foreigners. So did most other people of the time. So do most people today. We ourselves are often suspicious of people who look different, who talk differently, who aren't just like ourselves.
But it is not too late to learn the lesson of Ruth. ... should we not look at each person closely, as an individual with his own virtues and faults, and judge him for that and not for anything else.
And if we could find all the Ruths of the world, how much better off all of us would be.

You can't get lost in space,