Parenthood in a time of armageddon is a central theme, and it's not subtle about it. Every story element is named in a way that alludes to either parenthood or annihilation. The overarching plot describes the moral challenges of...

spoiler

...planning a next generation of humans to rise from the ashes, thousands of years after the previous generation went extinct. They died to an AI catastrophe, but it works just as well as an allegory for climate change.

Is it ethical to even subject a new generation to this, knowing what we know about how we fucked things up? If we're gonna try, do we have a duty to put in a kill switch in case things go off the rails again?

Obviously, the game sides firmly with the new humans, but it doesn't dismiss these questions out-of-hand, and it's okay with ambiguity and hypocrisy even on the part of Project Zero Dawn's chief architect.

The ending scene still gets me: https://www.youtube.com/watch?v=XFJ_vSCJdO0