Blacks were not enslaved because they were black but because...

Blacks were not enslaved because they were black but because they were available. Slavery has existed in the world for thousands of years. Whites enslaved other whites in Europe for centuries before the first black was brought to the Western hemisphere. Asians enslaved Europeans. Asians enslaved other Asians. Africans enslaved other Africans, and indeed even today in North Africa, blacks continue to enslave blacks.