Frederick Douglass began the conversation on the abusive system of slavery and advocated to end slavery along with racial prejudice. Douglass created The North Star, an antislavery journal, and other reformers followed. Harriet Tubman, David Ruggles, Sojourner Truth, and William Still helped assist slaves to escape to Canada or the North, where slavery was illegal. However, there was also a violent side to the situation. David Walker and Henry Garnet argued that slavery should be resolved by revolting against their owners. In effect, whits killed African Americans in order to control the revolt. After such violence, the antislavery talk in the south ceased to exist.