Billionaire entrepreneur Nick Hanauer says that today's inequality results from decades of bad economic theory. He argues for a reinvention of our capitalist system and our definition of prosperity.

Michael Tubbs has been saying "reinvent Stockton" since he was elected mayor. Having grown up in Stockton himself, Tubbs takes a community-oriented approach to creating positive change in the city.

Former gymnastics coach Valorie Kondos Field led her team to victory by creating a supportive environment, instead of a cutthroat one. The impact of that decision, she says, echoes far beyond the gym.

Imagine surrounding yourself with images and sounds, in order to set old ideas in a new context. OK Go's Damian Kulash Jr. describes the process that has inspired the band's hits and viral videos.

For some youth, being part of the solution means focusing their entire lives on the climate crisis. For Xiye Bastida, a 17-year-old climate justice activist, there is no hope without action.

If you had to explain to a newborn what it means to live on Earth, at this time of crisis — what would you say? Writer, illustrator, and artist Oliver Jeffers gives his answer in a letter to his son.

In 2015, Christiana Figueres helped pave the path to the historic Paris Agreement. She says more than ever we need stubborn optimism — a gritty, determined choice to make change because we have to.

It's easy to feel powerless against looming challenges we cannot control — like climate change. So what should we do? Political strategist Tom Rivett-Carnac says the power is in our mindset.