Re: Are we here because of Theia?
Both of these view see "civilization" and "environment" as something distinct.
The right view is somewhere along a black-box view: in the same ways as chaotic Earth transformed into an Biosphere given free energy and time, biosphere + self-rewriting brains able to use external storage will transform into something new. This transformation may of course fail utterly, the universe must be full of failure. This is the nature of this experiment.
Beyond that, we know of nothing yet.
We will now put you in communication with the VERY territorial insect supermounds of the orion arm. They have a message for the apes, which mysteriously is about kebab removal. Please hold the line!