Complex sentence: James Edward Oglethorpe was among the first to articulate the Enlightenment case against slavery, banning it in the Province of Georgia on humanistic grounds, arguing against it in Parliament, and eventually encouraging his friends Granville Sharp and Hannah More to vigorously pursue the cause.
Split into simpler sentences: James Edward Oglethorpe was among the first to articulate the Enlightenment case against slavery. Oglethorpe banned slavery in the Province of Georgia on humanistic grounds, argued against it in Parliament, and eventually encouraged his friends Granville Sharp and Hannah More to vigorously pursue the cause.