How did life come to be left out of Austin’s future?
Hurricanes, earthquakes, and tornados are considered forces of nature. With these, we expect the worst. A force of nature, beyond our control, is to be feared.
Life itself is a force of nature. Life, as a force, is inexorable, relentless. Life, too, is beyond our control. We can destroy life. We cannot create new life where none existed before.
Life expands and evolves to fit every niche and opportunity, given enough time and progeny. The more diverse the niches available (like a tropical rainforest), the richer and more varied the life that occupies them.