The 1926 Slavery Convention was an agreement between different countries that it is wrong and should be illegal to keep someone as property or treat them as if they were property. This means that no one can be bought and sold like an animal, or be forced to work against their will. It also means that people should not be tricked into slavery or made to do a job they don't want to do. The Convention made sure that all countries agreed that slavery was wrong, and would work together to keep it from happening.