Control

To put it bluntly: in earlier times, it was easier to control one million people than to physically kill one million people; today, it is infinitely easier to kill one million people than to control one million people.

Source: Zbigniew Brzezinski, In a Speech to Chatham House, London 2009
Taken From: Revolution and Repression in America: The Technological Revolution and the Future of Freedom, Part 2