From hippie culture to the first personal computers, Stewart Brand has been key to some of the most groundbreaking movements of the last century. This hour, he reflects on his life and career. Stewart Brand is the founder of the Whole Earth Catalog and co-founder of The Long Now Foundation, The Well and Revive & Restore. He is the author of The Media Lab: Inventing the Future at MIT, How Buildings Learn, The Clock of the Long Now: Time and Responsibility and II Cybernetic Frontiers. Brand has given many TED talks, including "The Long Now" and "The dawn of de-extinction.

On Day 5 of TED2017, one two-hour session included a in-depth conversation with Elon Musk and a powerful talk from writer Anne Lamott. The themes they shared echoed throughout the conference. Over the past five days, the TED2017 conference has explored the theme "The Future You." This has spanned an incredible number of ideas on a huge array of topics. Below, a tour through some of the key themes that emerged -- through the week and in the double-stuffed session of day 5. How will artificial intelligence reshape our world?

While some have embraced the rise of artificial intelligence, one expert is warning that technology could soon land humans in a'gorilla problem' if we're not careful. At TED2017, computer science expert Stuart Russell explained that engineering something'smarter than your own species' could have consequences, just as the emergence of intelligent humans did for their evolutionary ancestors. Russell says the possibility incites a'queasy feeling,' and warned that humans must create uncertainty in robots to unlock their full power and prevent them from turning against us. At TED2017, computer science expert Stuart Russell explained that engineering something'smarter than your own species' could have consequences, just as the emergence of intelligent humans did for their evolutionary ancestors. Science fiction author devised three laws of robotics, designed to prevent artificial intelligence from turning on its human creators.