That is true as well.
Same with the Native Americans.
We mearly spread them around, we sold them.
How is that so bad?
It did increase the need/want for slaves, but look at where the descendants of said slaves are now.
Edit: Also, consider the fact that the white man never, I mean NEVER, took slaves themselves.
They bought/traded them from African tribes who already had the slaves.
If anything, the white man helped Africa by buying slaves.
Slavery HELPED this world.
Without it, we would be at least 20 years behind right now.
I'm not justifying slavery, I'm just trying to get people to realize the white man isn't the devil, we ALL are the devil.