" People today think of the world as a uniquely dangerous place. It’s hard to follow the news without a mounting dread of terrorist attacks, a clash of civilizations, and the use of weapons of mass destruction. But we are apt to forget the dangers that filled the news a few decades ago, and to be blasé about the good fortune that so many of them have fizzled out. "

― Steven Pinker , The Better Angels of Our Nature: Why Violence Has Declined