I liked it.
Before I started studying 16th century history, I was very good with to/too/two and their/there and your/you're. Now I get them wrong more often than right, but the result is rarely something that makes me smile. "Futile" was a great typo :-)
And it made me think... humans are less fertile, but are they less futile? Does a feeling of futility have anything to do with the demographic turn? I would guess that less futility brings down fertility since people have a sense of control, but past a certain point, maybe that reverses.
Anyway, the typo is one of those errant events that reframes the question in an interesting way!
