"We don't expect long answers when we ask children what they want to be when they grow up," writes the anthropologist Mary Catherine Bateson in her landmark book about women improvising their realities, Composing a Life. Despite the infinite ways fate can turn, we look at the wide-eyed little ones in our midst and think: She will be a doctor. He will have two children. She will fall in love and stay in love with the right person, not like I did. We ask them to echo back our hopes as a way of quieting our fears.