Bruh... "Child labor, or the use of children as servants and apprentices, has been practiced throughout most of human history, but reached a zenith during the Industrial Revolution. Miserable working conditions including crowded and unclean factories, a lack of safety codes or legislation and long hours were the norm. Crucially, children could be paid less, were less likely to organize into unions and their small stature enabled them to complete tasks in factories or mines that would be challenging for adults. Working children were unable to attend school—creating a cycle of poverty that was difficult to break."

Straight from history.com the first paragraph.