How many children worked at 1840?

In 1840, it is estimated that around 1.5 million children were working in the United States, often in harsh conditions and for long hours. Many of these children were employed in factories, mines, and as domestic servants. Child labor was prevalent during this period due to economic necessity and a lack of labor laws protecting young workers. The exploitation of child labor eventually led to reform movements advocating for better working conditions and education for children.