Stuart Duncan is the creator of AutCraft, the first Minecraft server for children with autism and their families.

Stuart Russell wrote the standard text on AI; now he thinks deeply on AI's future -- and the future of us humans, too.

Stuart Oda is an indoor urban farmer with a passion for innovation and sustainability. His goal: democratize access to fresh and nutritious food by democratizing the means and knowledge of production.

Stuart Brown's research shows play is not just joyful and energizing -- it's deeply involved with human development and intelligence. Through the National Institute for Play, he's working to better understand its significance.

Tristram Stuart sounds the warning bell on global food waste, calling for us to change the systems whereby large quantities of produce and other foods end up in trash heaps.

Stuart Firestein teaches students and “citizen scientists” that ignorance is far more important to discovery than knowledge.

Elizabeth Stordeur Pryor writes, teaches and engages questions on race and racism in the US.

Curtis “Wall Street” Carroll overcame poverty, illiteracy, incarceration and a lack of outside support to become a stock investor, creator and teacher of his own financial literacy philosophy.

Frederick Streeter Barrett reveals how psychedelic experiences may allow us to tap into resources within ourselves to heal and to grow.

Jonathan Williams likes to tell stories and throw parties, so he started a church that allowed him to do both.

Maya Penn makes eco-friendly clothes and accessories, which she sells on a site she built -- and gives away a percent of the profits.

Sitawa Wafula started Kenya's first free mental health and epilepsy support line.

Hannah Brencher believes in the power of pen and paper, and has started a global initiative that encourages strangers to exchange love letters.

As an actor, filmmaker and founder of the online community HITRECORD, Joseph Gordon-Levitt seeks to inspire creativity through collaboration.

Birder and ecologist Washington Wachira started the Youth Conservation Awareness Programme to nurture young environmental enthusiasts in Kenya.

Pam Warhurst cofounded Incredible Edible, an initiative in Todmorden, England dedicated to growing food locally by planting on unused land throughout the community.

Not only does Jonathan Trent grow algae for biofuel, he wants to do so by cleansing wastewater and trapping carbon dioxide in the process. And it’s all solar-powered.

An outspoken feminist, Justin Baldoni has been doubling down on his efforts to start a dialogue with men to redefine masculinity.

Tito Deler is a soulful musician with a story to tell.

Tamas Kocsis is a self-taught web developer who was always obsessed by new technologies.

Larry Page is the CEO and cofounder of Google, making him one of the ruling minds of the web.

Kashmir Hill writes about privacy and technology.

Yvonne van Amerongen is an occupational therapist and a social worker.

Frances Larson explores the dark and varied obsessions that our culture has had with decapitated heads and skulls throughout history.

Roger Doiron wants everyone to plant a garden. He’s the founder of Kitchen Gardeners International, a network of home gardeners.

Her voice described as a “sweet gleaming soprano,” Danielle de Niese breathes new life into opera, astonishing critics and making audiences sit up and listen.

Thomas Suarez, a 12 year old, taught himself to build iphone apps.

When Jason B. Rosenthal's wife died, he says: "as clichéd as it sounds, I started working on living each day as it comes, to get through the complexities of life."

Betsy Kauffman helps leaders create innovative, aligned, disruptive agile organizations.

Nilay Kulkarni is the co-founder and chief technical officer of Ashioto Analytics, a real-time crowd flow analysis platform.