How did men like william lloyd garrison, reverend lovejoy, and fredrick douglass participate in the abolitionist movement?

All of these men involved themselves in the abolitionist movement by speaking out. They all were against slavery and one in particular, Frederic Douglas, wrote many books after being freed from slavery. He was also invited to go on tour and make speeches about antislavery. William Lloyd Garrison was a white male who was known for writing articles in the newspaper about antislavery. He founded a newspaper company known as the Liberator. And Reverend Lovejoy was a minister and newspaper editor.