Giulia Enders is working to reveal how our gut is at the core of who we are.

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

Human rights advocate Mohamed Ali fights terrorism with entrepreneurship.

Ndidi Okonkwo Nwuneli is an expert on social innovation, African agriculture and nutrition, entrepreneurship and youth development.

Tom Hulme's enthusiasm spans physics, design, entrepreneurship and investment.

Rebeca Hwang is co-founder and managing director of Rivet Ventures, investing in solutions for women and empowering their choices.

Environmentalist Jamie C. Beard is founder and executive director of the Geothermal Entrepreneurship Organization (GEO) at the University of Texas at Austin.

A passionate believer in creativity, innovation and entrepreneurship, Elizabeth Strickler uses her talents to support students and clients to start businesses, tell immersive stories, and build a stronger cultural economy.

Asher Hasan's social enterprise Naya Jeevan (the name means "new life" in Urdu and Hindi) is the emerging world's first HMO for the urban, working poor.

Ryan Panchadsaram is an engineer and investor focused on solving systemic societal challenges.

TED Fellow Tom Osborn is working to improve mental health for young people across Kenya.

Oded Shoseyov’s researches plant molecular biology protein engineering and nanobiotechnology, creating super-performing materials that are could change the way we build our future products.

The co-host of TEDxMidAtlantic, Dave Troy is a serial entrepreneur and a data-viz fan.

At Glasswing International, Celina de Sola works to address the root causes and consequences of poverty and violence.

Founder and CEO of myAgro, Anushka Ratnayake and her team work with rural farmers to help them move themselves out of poverty.

At the Center for Tech and Civic Life, Tiana Epps-Johnson works to make the US election system more modern, inclusive and secure.

Rodrigo Canales wants to understand how individuals influence organizations or systems--even those as complex as the Mexican drug cartels.

Priyanka Jain heads up product for pymetrics, an NYC-based startup that uses neuroscience and AI to make hiring more diverse and effective.

TED Fellow Matilda Ho is shaping the startup landscape to create more sustainable food systems in China.

Erika Cheung was one of the key whistleblowers in the Theranos scandal.

After witnessing the stigma related to menstruation, Ananya Grover took action with her classmates. She believes breaking silence is the first step towards period positivity.

Gayathri Vasudevan is CEO of LabourNet, a social enterprise that aims to enable the livelihood of the informal sector in India.

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.

Sevidzem Ernestine Leikeki has a drive to care for nature, foster women's empowerment and build future nature-lovers.

Nicaila Matthews Okome is the creator and host of "Side Hustle Pro," the first and only podcast to spotlight bold, black women entrepreneurs who have scaled from side hustle to profitable business.

Luma Mufleh does something revolutionary: she coaches soccer. A Jordanian immigrant and Muslim of Syrian descent, Mufleh is determined to empower refugee children everywhere.

Vikram Sharma uses quantum technology to strengthen cryptographic key management and encryption.

Iqbal Quadir is an advocate of business as a humanitarian tool. With GrameenPhone, he brought the first commercial telecom services to poor areas of Bangladesh. His latest project will help rural entrepreneurs build power plants.

Gayle Tzemach Lemmon writes about women around the world living their lives at war and in conflict zones.

Inveterate tinkerer Peter Haas is the co-founder of AIDG, the Appropriate Infrastructure Development Group, which connect people to electricity, sanitation and clean water through a combination of business incubation, education, and outreach.