Who are the ''white man''? Weren't Romans white too?
I don't think it has anything to do with skin colour. In the ancient world, there was civilisation and powerful rulers in China as well. There were civilisations in the Americas as well.
What makes the 'whites' different? Only the level of technology. Any society who achieved a great level of technology went on to explore the world..
Human sacrifice was widespread in the ancient world, so I wouldn't say all people were peaceful except the Romans..
What have the Romans ever done for us?