Slavery forms the backdrop to Philemon, and it is impossible to fully appreciate the book without some understanding of slavery in the Roman Empire.Slavery was taken for granted as a normal part of life in the ancient world. Indeed, the whole structure of Roman society was based on it. âSlavery grew with the growth of the Roman state until it changed the economic basis of society, doing away with free labor, and transferring nearly all industries to the hands of slavesâ (Marvin R. Vincent, The Epistles to the Philippians and to Philemon, International Critical Commentary [Edinburgh: T. & T. Clark, 1979], p. 162). During the period of the wars of conquest, most slaves were war captives. By the time of the New Testament, however, most slaves were born into slavery. The number of slaves was enormous, making up as much as one third of the population of the Empire. . . .