Actually, the Bible does mention slavery, Jato. On a number of occassions. Philemon himself was a slave owner and has a whole chapter devoted to him.
However, it gives conflicting information on God's standing in the matter, and the same passage can be easily translated into 2 contradictory statements.
But, look at Phillipians 2:3, Corinthians 7:21,24, Philemon 1:15,16, and Timothy 1:10 just for a few.
Some translate Philemon 1:15,16 as meaning that Paul supported the idea of slavery. Some translate it as meaning he did not. Also, some versions translate "servant" as "slave" and vice versa, and can be inconsistent in what they translate as what.
Again, it's all in the translation. But slavery is brought up, in a moral aspect, several times in the Bible. It's just not consistent in what it says about it.
