As sensors and networks continue to expand around the world, we'll see violence drop even further. After all, when there's a danger that your actions can be caught on tape and shown around the world, you're more responsible for your behavior.

Gossip, in its earlier forms, contained information that was critical to survival because, in clans of 150, what happened to anyone had a direct impact on everyone.

Millions of years ago, our brains became wired to remember about 150 people as 'close friends.'

Peter Diamandis Quotes