What do you want to be when you grow up? I bet you've been asked that question before. But have you ever thought about why humans work? There are almost 3.5 billion people working in the world today, and that number is growing. In Why Do We Work? author Monique Polak investigates the past, present and future of jobs, including how work has also been shaped by discrimination, privilege and child labor. Meet a variety of working professionals and explore why we have careers, vocations and professions. How is the way we work changing, and what will it look like in the future?