This is big title, but I have only a few moments to write. Why do I believe this? First, let me state that I believe that Reformed theology is Biblical theology. So many people, especially professing African American Christians, are ignorant of Reformed theology and scoff at what they are ignorant of. I believe Reformed theology answers the question of why African Americans are here. God's sovereign purpose and his gracious and merciful purpose. We are the descendants of slaves. European slave traders were implicit in the kidnapping of millions of Africans. The vast majority had done nothing to deserve enslavement. At the same time, millions of African slaves would turn to Christ in true faith. Look at this: European slave traders had a bad intention, but God had a good and glorious intention. On Reformed theology keeps these contrasts in tension believing that man is sinful and all of his ways are sinful, but that God has ordained whatsoever comes to pass while maintaing second causes such as human sinful actions.
Nothing happens by chance. God is sovereign. To argue against this is to lend oneself to atheism.