trans atlantic slave trade

The Atlantic Slave trade was a particularly brutal event in world history that saw millions of Africans displaced from their home to the Americas where many would die in bondage. The event lasted from the early 1500s after Spain decided to turn to Portuguese slavers to keep up with the labor...

Is there any plausible alternate history scenario where the European colonization of Americas could happen WITHOUT African slavery? What would have to happen in Europe's history to prevent it? Or is there something that could of happened in Africa's development that could of prevented it? Since...