In his book, Homo Deus: A Brief History of Tomorrow, Yuval Noah Harari explores the projects, dreams and nightmares that will shape the 21st century -- from overcoming death to creating artificial life. He maps the future and asks fundamental questions: Where do we go from here? How will we protect this fragile world from our own destructive powers? The book has sold four million copies since its publication in 2016.

Harari's previous book, Sapiens: A Brief History of Humankind, explores what made homo sapiens the most successful species on the planet. His answer: We are the only animal that can believe in things that exist purely in our imagination, such as gods, states, money, human rights, corporations and other fictions, and we have developed a unique ability to use these stories to unify and organize groups and ensure cooperation. Sapiens has sold eight million copies and been translated into more than 50 languages. Bill Gates, Mark Zuckerberg and President Barack Obama have recommended it as a must-read.

Harari lectures as a Professor of history at The Hebrew University of Jerusalem, where he specializes in world history, medieval history and military history. His current research focuses on macro-historical questions: What is the relationship between history and biology? What is the essential difference between Homo sapiens and other animals? Is there justice in history? Does history have a direction? Did people become happier as history unfolded? Harari has written for newspapers such as The Guardian, Financial Times, the Times, Nature magazine and the Wall Street Journal.

Harari's new book, 21 Lessons for the 21st Century, will take the pulse of our current global climate, focusing on the biggest questions of the present moment: What is really happening right now? What are today’s greatest challenges and choices? What should we pay attention to? The book will be published in multiple languages in September 2018.

Chris Anderson is the Curator of TED, a nonprofit devoted to sharing valuable ideas, primarily through the medium of 'TED Talks' -- short talks that are offered free online to a global audience.

Chris was born in a remote village in Pakistan in 1957. He spent his early years in India, Pakistan and Afghanistan, where his parents worked as medical missionaries, and he attended an American school in the Himalayas for his early education. After boarding school in Bath, England, he went on to Oxford University, graduating in 1978 with a degree in philosophy, politics and economics.

Chris then trained as a journalist, working in newspapers and radio, including two years producing a world news service in the Seychelles Islands.

Back in the UK in 1984, Chris was captivated by the personal computer revolution and became an editor at one of the UK's early computer magazines. A year later he founded Future Publishing with a $25,000 bank loan. The new company initially focused on specialist computer publications but eventually expanded into other areas such as cycling, music, video games, technology and design, doubling in size every year for seven years. In 1994, Chris moved to the United States where he built Imagine Media, publisher of Business 2.0 magazine and creator of the popular video game users website IGN. Chris eventually merged Imagine and Future, taking the combined entity public in London in 1999, under the Future name. At its peak, it published 150 magazines and websites and employed 2,000 people.

This success allowed Chris to create a private nonprofit organization, the Sapling Foundation, with the hope of finding new ways to tackle tough global issues through media, technology, entrepreneurship and, most of all, ideas. In 2001, the foundation acquired the TED Conference, then an annual meeting of luminaries in the fields of Technology, Entertainment and Design held in Monterey, California, and Chris left Future to work full time on TED.

He expanded the conference's remit to cover all topics, including science, business and key global issues, while adding a Fellows program, which now has some 300 alumni, and the TED Prize, which grants its recipients "one wish to change the world." The TED stage has become a place for thinkers and doers from all fields to share their ideas and their work, capturing imaginations, sparking conversation and encouraging discovery along the way.

In 2006, TED experimented with posting some of its talks on the Internet. Their viral success encouraged Chris to begin positioning the organization as a global media initiative devoted to 'ideas worth spreading,' part of a new era of information dissemination using the power of online video. In June 2015, the organization posted its 2,000th talk online. The talks are free to view, and they have been translated into more than 100 languages with the help of volunteers from around the world. Viewership has grown to approximately one billion views per year.

Continuing a strategy of 'radical openness,' in 2009 Chris introduced the TEDx initiative, allowing free licenses to local organizers who wished to organize their own TED-like events. More than 8,000 such events have been held, generating an archive of 60,000 TEDx talks. And three years later, the TED-Ed program was launched, offering free educational videos and tools to students and teachers.