Bret Victor was once a "Human Interface Inventor" for Apple, and was apparently key to the iOS/tablet efforts at the company. In this hour-long presentation to CUSEC (Canadian University Software Engineering Conference), he delivers a stirring manifesto for interaction design and relates it to having a principled stand on technology and ethics. It's an extraordinary presentation, first for the dazzling technology on display, and second for the thoughtful way Victor connects it to a larger question of human ethics and life.

Bret Victor - Inventing on Principle (Thanks, Danny!)