"I would suggest that it is a good in itself to acknowledge, to have enlarged, one's sense of how much suffering there is in the world we share with others. I would insist that anyone who is perennially surprised that depravity exists, who continues to experience disillusionment (even incredulity) when confronted with evidence of what humans are capable of inflicting in the way of gruesome, hands-on cruelties upon other humans has not reached moral or psychological adulthood.
No one after a certain age has the right to this kind of innocence, of superficiality, to this degree of ignorance, of amnesia.
We now have a vast repository of images that make it harder to preserve such moral defectiveness. Let the atrocious images haunt us. Even if they are only tokens and cannot encompass all the reality of a people's agony, they still serve an immensely positive function. The image says: keep these events in your memory."
See also: Don McCullin