What will the world look like in 50 years? The problems facing our world are so large that they demand disruptive thinking. We don't have time to think in incremental terms. It's time to challenge the status quo, and dare to imagine what we can do. Featuring: Shaifali Puri Elon Musk Sarah Caddick Geoffrey West Joi Ito Premal Shah Arianna Huffington Tanishq Abraham Sakena Yacoobi For more disruptive thinking, sign up for the Skoll World Forum newsletter, at www.skollworldforum.org