Amazon's climate pledge to be net-zero by 2040 | Dave Clark and Kara Hurst

TED is on a mission to discover and champion the ideas that will shape tomorrow. Reflecting on the evolution of that mission, TED's Chris Anderson and Monique Ruff-Bell cast a visionary gaze on the organization's future — including a revamped tagline, a renewed emphasis on debate and the launch of an exciting new conference — and explore the indispensable role of ideas in navigating societal challenges and fostering global innovation. Learn more about TED's enduring legacy, its path forward for the decades ahead and how you can join us in sparking a brighter future.

To get a free copy of the Infectious Generosity book, visit ted.com/generosity Each Sunday, TED shares an episode of another podcast we think you'll love, handpicked for you… by us. Today: an episode from The TED Interview. Back for a new season, Head of TED Chris Anderson interviews amazing thinkers about the ultimate idea worth spreading: infectious generosity. Bill Gates, the founder of Microsoft and the co-chair of the Bill & Melinda Gates Foundation, is one of the top ten richest people in the world. But since 2008, he has traded his day-to-day role with Microsoft to focus full-time on his foundation's work to expand opportunity around the world. Chris interviews Bill about his philanthropy philosophy and digs into the opportunities and challenges that face one of the largest private charitable foundations in the world. The two also discuss The Giving Pledge, the movement Bill co-founded with Warren Buffet, which encourages wealthy individuals to commit the majority of their wealth to charitable causes within their lifetimes. Chris and Bill examine the importance of solving the world’s most pressing problems efficiently, talk about why meaningful change requires scale, and compare notes on how to best encourage collective excitement about giving back.

We can all play a role in the climate movement by tapping into our skills, resources and networks in ways that bring us satisfaction, says climate leader Ayana Elizabeth Johnson. She suggests drawing a Venn diagram to map these questions: What are you good at? What is the work that needs doing? And what brings you joy? Where your answers intersect is where you should put your climate action effort. "Averting climate catastrophe: this is the work of our lifetimes," Johnson says.

There's a mistaken belief in today's working world that leaders need to be serious all the time to be taken seriously. The research tells a different story. Based on the course they teach at Stanford's Graduate School of Business, behavioral scientist Jennifer Aaker and corporate strategist Naomi Bagdonas delve into the surprising power of humor: why it's a secret weapon to build bonds, power, creativity and resilience -- and how we can all have more of it.

When filmmaker Desiree Akhavan told her Iranian immigrant parents she was in love with a woman, she knew they would object. She explains why it's worth the risk to let people get to know the real you.