José Andrés: We can save millions of lives simply by changing the way people cook

Gen. Stanley McChrystal: The illusion of being connected

Rep. Jim McGovern: We can end hunger in America now, all we need is the political will

Shiza Shahid: There are no Superheroes, Just Us: My Journey with Malala

Seth Goldman: How entrepreneurs can change society – the story of Honest Tea

Gbenga Akinnagbe: ‘Stop and frisk’ is a numbers game that must end

Sam Berns: My philosophy for a happy life

Akec Khoc Aciew: Birth of a nation: The story of South Sudan

Jon Jarvis: How climate change is already impacting our National Parks

Leigh Gallagher: The suburbs are dying, so let’s create a new American Dream

Susan Shaw: Reckless Endangerment: The Gulf Oil Spill Revisited

Paul Reed Smith: Building the perfect guitar

Isobel Coleman: How women are transforming the Middle East

Mickey Edwards: How to turn Democrats and Republicans into Americans

Liz Ogbu: Why I’m an architect that designs for social impact, not buildings

Michel Nischan: We need to stop thinking of food as fuel

Pierce Freelon: When art and activism make LOVE — a global beat revolution

Rachael Chong: The moment that shook my belief in giving

Mason Peck: NASA’s new grand challenge- Find the asteroids that threaten humanity

Lale Labuko: Fighting tribal practices to save the lives of children in Ethiopia

Jeff Speck: The general theory of walkability

Monique Sternin: To solve hard challenges, we must look for the positive deviants

JJ Rendon: The new face of dictatorship, and how we can stop it

Claire Fraser: Are we too clean? How changing a body’s microbes leads to illness

Austin Troy: If we want our cities to survive, they must be more energy efficient

Alexis Casson: Creating media to take back the narrative from big corporations

Andy Shallal: Bridging race and culture — the story of Busboys & Poets

Jimmy Lin: Solving the mystery of rare diseases with technology and crowdfunding

Jennifer Golbeck: The curly fry conundrum: Why social media “likes” say more than you might think

Henry Evans & Chad Jenkins: Meet the robots for humanity

Derek Braun: Tracing the roots of deafness to a gene that maybe prevented disease

Chris Ullman: Whistling for the President

Karen Rennich: Our bee populations are dying out, and here’s why we should care

Juan Llanos: Digital currencies like bitcoin are coming (and it’s a good thing)

Michael Smith: It’s time to invest in non-profits with impact

Gerard Ryle: How we took down corrupt figures using leaked financial documents

Ben Miller: The real estate deal that could change the future of everything

Carrie Irvin: The key to great schools is great boards

Lisa Guernsey:

Matthew Green: Why the NSA is breaking our encryption — and why we should care

Laurenellen McCann: The future of our cities and towns lies in… Open Data

Anwar Dafa-Alla: How TEDx is bringing change to Sudan amidst political crackdown

City of the Sun: Underground

City of the Sun: Te Lo Dije