Dubious Moments in the History of Christianty Post of the Day

Justo Gonzolaez, in The Story of Christianity, on the Church of England and the early Puritan settlers in America doing "little for the conversion of slaves," pp. 219-220:

The Church of England did little for the conversion of slaves. One of the reason for this was that there were ancient principles prohibiting Christians from hold fellow believers in slavery, and some insisted that those principles were still valid. Therefore, to avoid difficulties, slave owners preferred that their slaves not be baptized. In 1667, a law was passed declaring that baptism did not change a slave's condition--another indication of the degree to which established religion was willing to bend to the interests of the powerful. But even then little was done for the conversion of the slaves, since many owners felt that keeping them in ignorance was the best way to be assured of their service and submission.