 In 1688 he drafted together with Garret Hendericks, Derick op den Graeff, and Abraham op den Graeff the first protest against slavery in America.Pastorius was a cosigner of the 1688 Germantown Quaker Petition Against Slavery, the first petition against slavery made in the English colonies.Before the American Civil War, when abolition of slavery was gaining strength, Pastorius was ripe for celebration.