As a parent, this passage from a book review in Salon (registration required) reviewing several new books on Bush blew me away:

“Others make sense, like the probability that Bush, who surely experienced the usual sibling rivalry, felt some unconscious guilt over the death of his younger sister Robin, from leukemia, when he was 7 and she was 3. Bush's parents dealt with Robin's death by squelching any expression of grief; there was no funeral and they played golf the day after she died.”