As a Philadelphia high school principal, Linda Cliatt-Wayman held an unwavering belief in the potential of all children.

Margrethe Vestager is in charge of regulating commercial activity across the European Union and enforcing the EU’s rules designed to keep the markets fair.

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

Ghanaian Fred Swaniker founded a school and a leadership network to educate and support the next generation of Africa’s leaders.

Drew Dudley believes leadership is not a characteristic reserved for the extraordinary. He works to help people discover the leader within themselves.

An advocate for women's leadership, the Honorable Julia Gillard was 27th Prime Minister of Australia.

To create more confident, competent leaders and teams, Cindy Solomon is radically updating the way we think about leadership.

Jesper Brodin believes in values-based leadership and togetherness.

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

Angela Mahecha Adrar helps shape national and international agendas on climate change strategies.

Gitte Frederiksen explores the profound impact of disrupting current models of leadership -- and shows how to do it.

Jim Hagemann Snabe is the chairman of the world’s largest container transportation company, A.P. Møller - Mærsk, and of industrial giant Siemens. He is also a member of the board of trustees at the World Economic Forum.

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

Frances Frei is a professor of technology and operations management at the Harvard Business School.

David Logan is a USC faculty member, best-selling author, and management consultant.

Ivonne Roman cofounded the Women's Leadership Academy to increase the retention of women in policing.

The first woman elected president of Ireland, Mary Robinson is a passionate advocate for gender equality, feminist leadership, human dignity and climate justice.

BCG's Roselinde Torres studies what makes great leaders tick -- and figures out how to teach others the same skills.

A leading interpreter of Mahler and Beethoven, Benjamin Zander is known for his charisma and unyielding energy -- and for his brilliant pre-concert talks.

After a decade-long conducting career in his native Israel, Itay Talgam has reinvented himself as a "conductor of people" -- in government, academia, business and education. He is the author of The Ignorant Maestro.

Gala Jackson is a career and life management coach who helps people transform their careers with courage, clarity and confidence.

Using a principle he calls “convex lens leadership,” R.A. Mashelkar’s vision has catapulted india’s talent for science and innovation onto the international stage.

Cady Coleman draws from her time at NASA and her missions on the International Space Station to share insights about team building, leadership and innovation.

Dwinita Mosby Tyler specializes in the development and delivery of leadership, equity, diversity, cultural responsiveness and inclusion training programs and strategies.

Activist Patrisse Cullors created the hashtag #BlackLivesMatter as a tonic against years of injustice by police forces and prisons.

Valérie Courtois is director of the Indigenous Leadership Initiative and a leading expert on the national movement of Indigenous-led conservation and stewardship in Canada.

At XponentialWorks, Avi Reichental is helping to imagine a future where 3D scanning-and-printing is an everyday act -- where food, clothing and objects are routinely output at home.

LeeAnn Renninger is the founder of LifeLabs Learning, a company that trains managers and teams at innovative companies around the globe. Her specialty is in rapid skill acquisition -- the fastest way to learn a skill that matters most.

Jon Gosier is a serial tech entrepreneur and early-stage startup investor. In 2015, Time magazine listed him as one of the "12 New Faces of Black Leadership."

Karen Eber believes storytelling is one of the most impactful ways to shape culture, and engage people.