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以下、世界設定原文。

"Gaia" and The Unborn
Throughout time,life forms on this planet have continued to evolve and prosper. But it is also true that there are many life forms that have become extinct, unable to evolve. How exactly is this decided? Is there something on this planet that has the power to influence the future of these life forms?
Mankind thought of earth as a single giant life form able, through its self-balancing nature, to preserve an ideal natural environment for the life upon it. This life form was named "Gaia".
Mankind also called the life forms taken by Gaia through natural selection, as well as the life forms that would have survived had they continued to evolve, "The Unborn".

書き写すの面倒。というわけで、訳については明日にでも…。