Ai-Jen Poo is interested in the work that makes all other work possible. We’re talking about nannies, housekeepers and caregivers for the elderly who go into other people’s homes every day to make it possible for them to go out into the world and do what they do. Her goal is to bring dignity and respect to that work. Poo is director of the National Domestic Workers Alliance and co-director of Caring Across Generations. Her new book is The Age of Dignity: Preparing for the Elder Boom in a Changing America.