Because if you think owning people is OK, you deserve to have your wrongness explained to you in rhyme.
The year: 1835. The place: Philadelphia. It was then and there that 18 affluent black and white Quaker women decided to form the Philadelphia Female Anti-Slavery Society.
They immediately got down to business, but massively shifting public opinion is not an easy task.
Because women were not permitted to vote or hold public office at that time, the society members had to use creative and unconventional means to sway people away from supporting slavery. This included writing letters, fielding petitions and holding annual anti-slavery fairs.