Removing or encroaching the environments in which these primitive cultures still exist is a sin. Bringing Africans to other parts of the world as slaves and then expecting their descendants to function as elements in advanced societies is laughable. So too with those idiot 'missionaries' that contact isolated tribes in order to save their souls only to find out that the forest people don't believe in the same magic. There are oceans between us for a reason. Diversity (as it is commonly known) is immoral.