Robert Muggah creates tools to understand cycles of violence in urban environments and opens dialogues on ways to confront them globally.

As founder of International Justice Mission, Gary Haugen fights the chronically neglected global epidemic of violence against the poor.

In 1994, Esta Soler was among the key advocates for a US law to combat the devastating effects of violence against women. Today, her mission is global.

After Rep. Gabby Giffords was wounded by a would-be assassin’s bullet in January 2011, she and her husband, Mark Kelly, a NASA astronaut, retired US Navy captain and combat veteran, have become known around the world for their story of hope and resilience.

Jackson Katz asks a very important question that gets at the root of why sexual abuse, rape and domestic abuse remain a problem: What's going on with men?

Could our culture have misdiagnosed violence? As the director of the initiative Cure Violence, Gary Slutkin approaches gunfire on neighborhood streets as a contagious disease, looking to science and public health for strategies to stop it.

Veterinarian, dog trainer and animal behaviorist Ian Dunbar understands our pets' point of view. By training dog owners in proper conduct (as much as he trains the dogs themselves), he hopes to encourage better relationships with dogs -- not to mention their friends and children, too.

An investigative journalist who reports on the FBI’s misuse of informants in counterterrorism operations, Trevor Aaronson asks the question: Is the United States catching terrorists or creating them?

Inés Hercovich is a pioneer in the study of sexual violence against women.

The Beirut Marathon is the largest running event in the Middle East. May El-Khalil founded it as an instrument of peace.

Ilona Szabó de Carvalho designs solutions for some of the world's biggest challenges -- from reducing violence and reforming drug laws to renewing democracy and fighting polarization.

Prison reform advocate Ismael Nazario helps former inmates from New York's Rikers Island jail reenter society.

Leslie Morgan Steiner is a writer and outspoken advocate for survivors of domestic violence -- which includes herself.

University student Ione Wells is the founder of the international #NotGuilty campaign against sexual violence and misdirected victim blaming.

Sue Klebold has become a passionate agent working to advance mental health awareness and intervention.

Alice Goffman’s fieldwork in a struggling Philadelphia neighborhood sheds harsh light on a justice system that creates suspects rather than citizens.

Dr. Erin Marie Saltman manages Facebook's counterterrorism and counter-extremism policy work for Europe, the Middle East and Africa.

Tony Porter is an educator and activist who is internationally recognized for his effort to end violence against women.

TED Resident Carlos Bautista wants to close the information and technology gap for people in developing countries.

By using citizen journalism platforms, Meera Vijayann explores creative ways that young women can participate in politics and community matters.

Human rights advocate Mohamed Ali fights terrorism with entrepreneurship.

Marwa Al-Sabouni suggests that architecture played a crucial role in the slow unraveling of Syrian cities' social fabric, preparing the way for once-friendly groups to become enemies instead of neighbors.

Sloan Scholar, Fulbright Fellow, Professor Emeritus of Neuroscience, Jim Fallon looks at the way nature and nurture intermingle to wire up the human brain.

Ameera Harouda leads journalists to the harrowing (and often hidden) stories of the Gaza Strip that they couldn’t find on their own.

Melvin Russell is bringing stakeholders together to work toward the common goal of peace and prosperity for Baltimore City.

Deeyah Khan is working to create intercultural dialogue and understanding by confronting the world's most complex and controversial topics.

Samantha Nutt envisions a world where no child knows war.

Thomas Abt developed an innovative, evidence-informed model to reduce urban violence.

Bringing cross-disciplinary tactics and innovation to a moribund defense industry, N Square’s Erika Gregory seeks to wean the world from its nuclear stockpiles.

Jessica Ladd is using technology to combat sexual assault, empower survivors and advance justice.