No, slavery long pre-dates and post-dates the Bible, as Colpy said, slavery's been a feature of all civilizations until recently, and still is in some places. I meant only that the African slave trade in the Christian west was started by the Christian west. The major point is that the Bible nowhere condemns slavery, not even Jesus is reported as speaking out against it, the whole text just takes it as a given, and it even offers rules about it, as the billboard in the OP says, in both the Old and the New Testaments. So whatever Christians came out against it in the abolitionist movement, they weren't getting their ethics from the Bible. The secondary point is that the King James version of the Bible in the verse cited in the billboard in the OP says servants, not slaves, and can be read as being about an employer-employee relationship. In that context what it says seems perfectly reasonable, employees should do as the boss instructs, and the boss should be fair and equitable. Maybe you missed it, but I was agreeing with your point about context.