Reason behind Gentiles' Enslavement of Black people

The Gentiles have never told black people why they enslaved them. To my knowledge, blacks have never asked for a reason. Black people do not know why they were enslaved by the Gentiles. That, the enslavement, being a part of our history, blacks should desire to know why. To that end, as the title suggests, I shall give reason for the Gentiles' enslavement of black people.