But the only thing that changed his mind was her call from the past, and if she hadn't seen the future when he told her what he needed to hear in the past then she wouldn't have been able to change his mind. It's a pretty clear time paradox that I can only make sense of if humanity is beginning to evolve into some kind of gestalt entity.

And if I had to guess I'd say the idea of free will is left up to interpretation, as it's said that she chose to have a child, even while it was also implied by the aliens that everything was preordained. Both perceptions might be subjectively correct depending on which species you ask, and I don't think the movie made it clear one way or the other.