Overall, it's quite a positive ending. I wonder whether someone dared him to write something dystopian, but with an upbeat ending.
I wish that book didn't have a part three.
Me, too. My background is biomedical, so i spent most of it thinking "epigenetics doesn't work like that!"
As a layperson I felt like the time frame in which they were suggesting this extreme genetic shift would happen seemed a little much. The pace of the book was also completely different.
Which book is that?
Seveneves, if I'm reading the OP correctly. By Neal Stephenson.
Anathem, Neal Stephenson. (Seveneves also mentions plane change maneuvers but Anathem has this quote repeated verbatim several times and is closer to the topic at hand. Then again, more people seem to be disappointed with Seveneves' ending, so who knows.)