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

Kang Lee has devoted his career to understanding the development of social cognition and behavior.

Ramona Pierson develops tools to revolutionize learning management and assessment systems -- her fourth career after aviation, neuropsychology and software development.

Jonathan Wilker explores the science and engineering happening within our oceans. He works to understand the ways that sea creatures survive and how we can adapt their technologies to create new materials.

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.

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

Massimo Russo is a senior partner emeritus at BCG and a former fellow of the BCG Henderson Institute.

Amina J. Mohammed is the Deputy Secretary-General of the United Nations and Chair of the UN Sustainable Development Group. Previously she served as Minister in the Nigerian government.

Kimberly Noble, MD, PhD, studies how socioeconomic inequality relates to children's cognitive and brain development.

BCG's Leila Hoteit specializes in human capital and education throughout the Middle East.

Senior TED Fellow Constance Hockaday is an artist and an organizational development leader.

Regina Hartley thinks that those who don't always look good on paper may be just the person you need to hire.

Ashley M. Grice believes in the power of wonder and unconventional thinking to disrupt industries and the status quo.

Khulan Batkhuyag helps consumers, businesses and countries create healthier and earth-friendly behavioral changes.

Nancy Lublin, cofounder and former CEO of Crisis Text Line, uses technology and data to save lives.

Iyad Rahwan's work lies at the intersection of the computer and social sciences, with a focus on collective intelligence, large-scale cooperation and the social aspects of artificial intelligence.

In his provocative, mind-bending book "The Secret Life of the Mind," neuroscientist Mariano Sigman reveals his life’s work exploring the inner workings of the human brain.

Achenyo Idachaba is the head of MitiMeth, a Nigeria-based company that makes handicrafts from aquatic weeds and other agro-waste.

Dr. Karen DeSalvo is a nationally recognized health policy leader working at the intersection of medicine, public health and information technology to improve the health of people and their communities.

Tim Jackson is a British ecological economist and professor for sustainable development at the University of Surrey. He is the author of "Prosperity without Growth" and director of the Centre for the Understanding of Sustainable Prosperity.

One of the best known and most renowned scientists in history, Richard Feynman pioneered quantum mechanics. His knack for accessible explanations made him a popularizer of physics of equal distinction to laypeople.

Lindsay Malloy studies how kids function in a legal system that was designed for adults.

Henna-Maria Uusitupa investigates innovative solutions to minimize health risks that infants might have due to disruptions in microbiota development.

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.

Sara Menker is founder and CEO of Gro Intelligence, a tech company that marries the application of machine learning with domain expertise and enables users to understand and predict global food and agriculture markets.

Herbie Hancock is an iconic jazz musician, known as much for his mastery of the traditional as he is for entirely changing the game.

A human resources activist, Morgana Bailey wants to see the diversity of society reflected in the workplace, and employees of all walks of life feel comfortable being open about who they are.

Dan Barasch’s grandmother grew up in New York’s Lower East Side. Now, he’s building an underground park in her old neighborhood, where greenspace is limited.