Maajid Nawaz works to promote conversation, tolerance and democracy in Muslim and non-Muslim communities.

A professor of economics at the University of Waterloo in Canada, Larry Smith coaches his students to find the careers that they will truly love.

Tina Seelig teaches innovation and entrepreneurship and is passionate about creative problem-solving.

Will Guidara believes in the remarkable power of hospitality.

Jacqueline Novogratz works to enable human flourishing. Her organization, Acumen, invests in people, companies and ideas that see capital and networks as means, not ends, to solving the toughest issues of poverty.

Nadia Lopez is the founding principal of Mott Hall Bridges Academy, where she is showing the world how underprivileged communities can beat the odds and create positive institutions that have a global impact.

Ken Chenault invests in fast-growing companies that have the potential to become large, fundamental institutions.

Linda Hill studies collective genius -- the way great companies, and great leaders, empower creativity from many.

BCG's Rocío Lorenzo advises telecommunication and media companies on their strategy and how to transform their businesses in times of digital disruption.

Fred Krupp is a leading voice on climate change, energy and sustainability, and a champion for harnessing the power of the marketplace to protect our environment.

'Gbenga Sesan empowers underserved people with information and communications technology.

As President and CEO of Nasdaq, Adena Friedman provides a benchmark for the performance of publicly-traded technology companies for investors around the world.

Daniel Goleman, psychologist and award-winning author of Emotional Intelligence and other books on EI, challenges traditional measures of intelligence as a predictor of life success.

A principal engineer at Intel, Maria Bezaitis focuses on how constellations of personal data can form new business models.

A powerhouse of scientific leadership in Africa, Christian Happi sequences and studies the genomes of infectious diseases like Ebola, HIV and coronavirus.

For over 15 years Diana has been a secondary social studies teacher in Wisconsin, Kansas, Arizona and Pennsylvania.

Michele L. Sullivan is known for her sustainable and collaborative approach to philanthropic investing.

Ji-Hae Park spreads the joy of classical to music to those who might not otherwise hear it -- and in the process shows that you can rock out on the violin.

Amy C. Edmondson studies people and teams seeking to make a positive difference through the work they do.

Hamish Jolly brings his entrepreneurial eye to the rare but viscerally terrifying issue of shark attacks.

Michael C. Bush is helping to build a better world by helping organizations become great places to work for all.

Driven by a belief in fairness, Simone George is a human rights lawyer and activist.

UPS's Aparna Mehta works with the top-tier retail customers to develop innovative, profitable solutions that enhance customer experiences.

David R. Williams asks: What if we decided to tackle the striking levels of early death and poor health that are due to the color of one's skin?

Ai-jen Poo has spent the last 20 years bringing care and respect to the women that care for us.

Rha Goddess is a cultural innovator, social impact strategist and creative change agent. She works with leaders and organizations to realign their missions in ways that are more purposeful, profitable and impactful.

Dr. Brené Brown studies courage, vulnerability, shame and empathy.

Devdutt Pattanaik looks at business and modern life through the lens of mythology.

Patrick J. McGinnis is a venture capitalist, writer and speaker.

James Rhee is an acclaimed entrepreneur, leader and goodwill strategist