You could talk about how childhood only started to exist as a construct after the industrial revolution in Europe when a distinction between child" and adult' emerged. Before this time, children were 'mini-adults' and were not iterected from the harsh realities of adult life. Children lived and worked in the adult world and learned the skils for life as they grew up. After industrialisation, when the home and the workplace separated, the concept of 'child" as a distinct construct emerged.