"Both the bible and koran fumble on the softball question on whether slavery is wrong. A 10 year old knows the answer to these questions, yet our most revered books don't.
Exactly"
Saw this claim earlier and meant to say something, but had other things to do, so glad to have the chance to come back to it.
In the ancient world, the world in which the Bible was written, slavery was the norm. It was widely practised and taken for granted. It is not surprising that no one of the the Bible's many writers says 'slavery is wrong and should be abolished', because slavery was an integral part of those societies.
In that context, the Bible has many interesting things to say. In Exodus, God brings the Israelites out of slavery in Egypt. In the Mosaic Law provision is made for those who have sold themselves into slavery to repay debts to be freed in the jubilee year (every seventh year). When Paul addresses the duties of masters and slaves he is writing about a world where slave-owners had no legal obligations towards their property and where (in the Hellenic world where Paul spent most of his life) the word for slave was the same as the word for work - linguistically they were simply units of work, rather than human beings. Finally, one of Paul's companions, whom he regarded as a son, was a freed slave.
It's so easy to read our attitudes now back into history and say 'even a 10 year old knows slavery is wrong.' But a 10 year old in Rome would not have known it was wrong; nor a 10 year old in Britain in 1800; nor a 10 year old in the Confederate states in 1850.
We ourselves probably hold attitudes and regard things as natural that in the future will seem ludicrous. The question to ask of the Bible is not, does it replicate our own current attitudes - and if it doesn't, let's throw it away! - but, what can its stories and wisdom say to us now in our own historical situation.
This is what slaves in the Americas and Caribbean did when they drew inspiration for their own struggles from the book of Exodus. Of course, the Bible was also used to justify slavery. But it should not be forgotten that the repeal of the slave trade was brought about because Christians campaigned against it - convinced by their reading of the Bible, that this was the right thing to do.