Ellen Agler is passionate about improving the health and well-being of the most vulnerable members of our human family.

Scott Williams thinks the modern health systems would cease to function without the crucial role played by caregivers.

Through his William J. Clinton Foundation, former US President Bill Clinton has become a vital and innovative force for world change. He works in four critical areas: health, economic empowerment, citizen service, and reconciliation.

Jody Williams won a Nobel Peace Prize for her efforts to eradicate landmines. Now she’s teaming up with five other female peace laureates to empower women to fight violence, injustice and inequality.

In partnership across traditional boundaries, Howard Taylor leads efforts that leverage public and private resources to put a stop to violence against children and change harmful societal attitudes.

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.

Economist Dr. Raghuram Rajan proposes that world leaders allow the state and institutions to manage economic health, neglecting a crucial component of prosperity: the "third pillar" of locally based communities.

Bernhard Kowatsch is the head of the Innovation Accelerator of the United Nations World Food Programme (WFP), which he created in 2015.

Leon Marchal is passionate about discovering more sustainable animal production.

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.

Economist Dilip Ratha was the first to analyze the global significance of remittances -- money sent from foreign workers to their families back home.

Fields Wicker-Miurin wants to improve the quality and impact of leadership worldwide by discovering leaders in unique, local settings and connecting them with one another.

Joshua Chu-Tan's work looks at multi-targeted ways in which we can tackle the problems that lead to common retinal diseases by using molecules our body naturally produces.

Magatte Wade creates jobs in Africa -- and calls attention to the obstacles to job creation on the continent.

As CEO of Walgreens Boots Alliance and member of the WBA Board of Directors, Rosalind G. Brewer leads the company’s initiative to positively impact the lives of millions of people around the world every day.

Emily Leproust is an early pioneer in the synthesis and sequencing of DNA.

Sasa Vucinic's Media Development Loan Fund applies venture-capital principles to create a sustainable free press in developing nations and countries emerging from repressive regimes.

At Sightsavers, an international NGO, Caroline Harper leads efforts to eliminate avoidable blindness around the world and fight for equal rights.

Chad Frischmann is working to get humanity to "drawdown," the point in time when the concentration of atmospheric greenhouse gases begins to decline on a year-to-year basis.

Nic Marks gathers evidence about what makes us happy, and uses it to promote policy that puts the well-being of people and the planet first. He's the founder of the Centre for Well-Being at the UK think tank New Economics Foundation (NEF).

Noreena Hertz looks at global culture -- financial and otherwise -- using an approach that combines traditional economic analysis with foreign policy trends, psychology, behavioural economics, anthropology, history and sociology.

Wendy Woods is a Managing Director and Senior Partner of Boston Consulting Group (BCG) and Vice Chairman of BCG's Social Impact practice, which she helped create.

Lucas Joppa leads Microsoft’s sustainability strategy across its worldwide business and founded the company’s AI for Earth program.

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.

Nana Firman wants to unite the world behind a commitment to sustainability and environmental justice.

Debbie Lovich is a managing director and senior partner at BCG, where she is the global leader of BCG's people strategy topic.

Epidemiologist Seth Berkley is leading the charge to make sure vaccines are available to everyone, including those living in the developing world.

Audrey Choi is a thought leader on how finance can be harnessed to address public policy challenges.

Esther Duflo takes economics out of the lab and into the field to discover the causes of poverty and means to eradicate it.

A banker by training, Pavan Sukhdev runs the numbers on greening up -- showing that green economies are an effective engine for creating jobs and creating wealth.