This was an extraordinary graph, not least because of the great way they described the data. You will need to click on it and download and zoom and gape and wonder. If you do want to get upset, there is much blame to go around. Some of them really surprised me, Aurangzeb was responsible for 4.6 million deaths? Or the British Famines in India killed 27 million or that the fall of the Ming Dynasty killed off 25 million. What was horrific was the sheer scale of the deaths due to the slave trade (curious how much we know about the Atlantic trade versus the middle east trade).