Actually, no. Most of that was buying slaves from locals and shipping them away. Sure; not all African civilizations were so crude and nasty... But a fair number of them wás. You can try to sugar-coat it all you want, but the Mayans ate people and burned down rainforests, the Zulus traded in slaves, and the Norse made clothing out of Christians. We've all got things down the line of our ancestors that we're not proud of; maybe we shouldn't romanticize them too much.