Cedric Habiyaremye is the scientist who brought quinoa to Rwanda and other parts of Africa.

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

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.

Gary Kovacs is a technologist and the former CEO of the Mozilla Corporation, where he directed the development of Firefox.

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

Zoë Karl-Waithaka is a partner at BCG in Nairobi.

T. Morgan Dixon is the cofounder and CEO of GirlTrek, inspiring more than 100,000 neighborhood walkers.

Amber Hikes provides vision, leadership and direction for the ACLU's nationwide strategy to support equity, diversity and inclusion across all aspects of the organization's work and efforts.

Deepa Purushothaman challenges and redefines the status quo of leadership success and power, centering the needs and experiences of women of color and unveiling inclusion biases in corporate structures.

Rachel Kyte works to mobilize finance and spur action along a critical path towards a resilient, inclusive and decarbonized world.

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

Ali Noorani has traveled the world listening to the stories of migrants -- along with the stories of those who welcome them and those who fear them.

TED Fellow Germán Santillán is reviving Indigenous chocolate-making practices through artisanal Mexican chocolate.

Halla Tómasdóttir is CEO of The B Team, a group of global business and civil society leaders driving a better way of doing business for the well-being of people and the planet.

As head of Intel Studios, Diego Prilusky is ushering in the next revolution in visual storytelling: volumetric video, which aims to recreate reality as a cinematic experience.

Marcos Aguiar is a core member of BCG's technology, media and telecommunications and global advantage practices.

Patrice Gordon's passion for people and helping them realize their full potential led her to a career in coaching.

In the tribal region where she was born, Khalida Brohi founded an organization to end honor killings and empower Pakistani women.

Wanjira Mathai has more than 20 years of experience advocating for social and environmental change on both local and international platforms.

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

Sarah Ellis is the co-founder of Amazing If, an award-winning career development company with a mission to make work better for everyone.

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.

Matt Mullenweg is the co-founder of the open-source blogging platform WordPress, the most popular publishing platform on the web, and the founder and CEO of Automattic.

Anote Tong has built worldwide awareness of the potentially devastating impacts of climate change.

TED Resident Paul Tasner is the co-founder and CEO of PulpWorks, Inc., designers and manufacturers of biodegradable packaging for consumer goods.

Greg Stone was a key driver in the establishment of the Phoenix Island Protected Area in the island nation of Kiribati. The second-largest marine protected area in the world -- and one of the most pristine -- PIPA is a laboratory for exploring and monitoring the recovery of coral reefs from bleaching events.

Wanda Irving envisions a health care system where no individual is excluded.

Victor Rios seeks to uncover how to best support the lives of young people who experience poverty, stigma and social exclusion.

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