A must-see. To understand how everything we do electronically leaves a fingerprint which is processed into a personality profile that is then used to manipulate us. Corporate data mining for social power and huge profit. Ever done a "personality test" on-line? Every purchase you make with a card. Things you "like," and even if you have been careful, your friends may agree to hand over all of your information unwittingly, when they agree to "terms and conditions" for an app. This doesn't have to be seen as from one political side or another. It's like climate change. We're all in it now, whether we believe it or not.