In this landmark book, sociologist Viviana Zelizer traces the emergence of the modern child, at once economically "useless" and emotionally "priceless," from the late 1800s to the 1930s. Having established laws removing many children from the marketplace, turn-of-the-century America was discovering new, sentimental criteria to determine a child's monetary worth. The heightened emotional status of children resulted, for example, in the legal justification...