What is a quote that connects to the theme "Man's inhumanity to man"??

And that, my young friends, is the story of our country, one invader after another […] Now the Soviets. But we're like those walls up there. Battered, and nothing looks pretty to look at, but still standing."

Basically Afghanistan has been a place of war for its entire history. Violence seems a part of Afghanistan whether sectarian, ethnic, or geo-political.