This is not really a review, but it's Octavia Butler's birthday, and I want to use the opportunity to encourage everyone to read this trilogy, one of the most disturbing and brilliant things I've ever read. I first read it about four years ago, taught it three times since then, and it always leads to intense, rewarding discussions. There are so many layers here, every time I read and talk about it, I come away with something new. Likewise, my impression of and opinion about the story's aliens, the Oankali, keeps changing, from horror to approval to longing and back again.
It's here where Butler remarks that humanities core problem is being 'intelligent and hierarchical'. So far, I haven't found a better assesment.