Reducing violence in cities in the US isn't the impossible, intractable challenge many believe it to be, says crime researcher and educator Thomas Abt. He explains how urban violence is "sticky" -- meaning that it clusters among a surprisingly small number of people and places -- and presents an innovative, targeted strategy to make our cities s...

What can you do to build a better world? Sharing stories from her pioneering career dedicated to tackling poverty, Jacqueline Novogratz offers three principles to spark and sustain a moral revolution. Learn how you can commit (or recommit) to creating big, positive change in your lifetime -- and give back more to the world than you take from it....

What if you could know exactly how food or medication would impact your health -- before you put it in your body? Genomics researcher Jun Wang is working to develop digital doppelgangers for real people; they start with genetic code, but they'll also factor in other kinds of data as well, from food intake to sleep to data collected by a "smart t...

Conservatives and liberals both believe that they alone are motivated by love while their opponents are motivated by hate. How can we solve problems with so much polarization? In this talk, social scientist Arthur Brooks shares ideas for what we can each do as individuals to break the gridlock. "We might just be able to take the ghastly holy war...

Around the world, Black girls are being pushed out of schools because of policies that target them for punishment, says author and social justice scholar Monique W. Morris. The result: countless girls are forced into unsafe futures with restricted opportunities. How can we put an end to this crisis? In an impassioned talk, Morris uncovers the ca...

The world's most valuable tech companies profit from the personal data you generate. So why aren't you getting paid for it? In this eye-opening talk, entrepreneur and technologist Jennifer Zhu Scott makes the case for private data ownership -- which would empower you to donate, destroy or sell your data as you see fit -- and shows how this growi...

Profit, money, shareholders: these are the priorities of most companies today. But at what cost? In an appeal to corporate leaders worldwide, Chobani founder Hamdi Ulukaya calls for an end to the business playbook of the past -- and shares his vision for a new, "anti-CEO playbook" that prioritizes people over profits. "This is the difference bet...

In a forward-looking talk, author Bina Venkataraman answers a pivotal question of our time: How can we secure our future and do right by future generations? She parses the mistakes we make when imagining the future of our lives, businesses and communities, revealing how we can reclaim our innate foresight. What emerges is a surprising case for h...

Everyone's heard of Martin Luther King Jr. But do you know the woman Dr. King called "the architect of the civil rights movement," Septima Clark? The teacher of some of the generation's most legendary activists -- like Rosa Parks, Diane Nash, Fannie Lou Hamer and thousands more -- Clark laid out a blueprint for change-making that has stood the t...

Every new invention changes the world -- in ways both intentional and unexpected. Historian Edward Tenner tells stories that illustrate the under-appreciated gap between our ability to innovate and our ability to foresee the consequences.

Designer Alastair Parvin presents a simple but provocative idea: what if, instead of architects creating buildings for those who can afford to commission them, regular citizens could design and build their own houses? The concept is at the heart of WikiHouse, an open source construction kit that means just about anyone can build a house, anywhere.

By 2050, an estimated 10 billion people will live on earth. How are we going to provide everybody with basic needs while also avoiding the worst impacts of climate change? In a talk packed with wit and wisdom, science journalist Charles C. Mann breaks down the proposed solutions and finds that the answers fall into two camps -- wizards and proph...

Some days, it's hard to be optimistic. But cynicism -- the idea that people are inherently selfish, greedy and dishonest -- is making humanity lonelier and more divided, says psychologist Jamil Zaki. Presenting fascinating research on cooperation, empathy and trust, Zaki makes the scientific case for optimism and shows us how to break out of the...

In a talk about how we can build a robust future without wrecking the planet, sustainability expert Johan Rockström debuts the Earth3 model -- a new methodology that combines the UN Sustainable Development Goals with the nine planetary boundaries, beyond which earth's vital systems could become unstable. Learn more about five transformational po...

Computer skills aren't what's stopping people from breaking into the tech industry, says social entrepreneur Irma L. Olguin Jr. More often, the biggest hurdles are things like access to childcare, transportation and financial stability. In this visionary talk, Olguin Jr. introduces the work she's done to uplift and empower people in her communit...

Since its founding in 1851, the "New York Times" has published thousands of obituaries -- for heads of state, famous celebrities, even the inventor of the sock puppet. But only a small percentage of them chronicle the lives of women and people of color. In this insightful talk, "Times" editor Amy Padnani shares the story behind "Overlooked," the...

Luvvie Ajayi Jones isn't afraid to speak her mind or to be the one dissenting voice in a crowd, and neither should you. "Your silence serves no one," says the writer, activist and self-proclaimed professional troublemaker. In this bright, uplifting talk, Ajayi Jones shares three questions to ask yourself if you're teetering on the edge of speaki...

"The only way we're going to make substantial progress on the challenging problems of our time is for business to drive the solutions," says social impact strategist Wendy Woods. In a data-packed talk, Woods shares a fresh way to assess the impact all parts of business can have on all parts of society, and then adjust them to not only do less ha...

Worldwide, violence is on the decline, but in the crowded cities of the global south — cities like Aleppo, Bamako and Caracas — violence is actually accelerating, fueled by the drug trade, mass unemployment and civil unrest. Security researcher Robert Muggah turns our attention toward these "fragile cities," super-fast-growing places where infra...

How did the US immigration debate get to be so divisive? In this informative talk, historian and writer Paul A. Kramer shows how an "insider vs. outsider" framing has come to dominate the way people in the US talk about immigration -- and suggests a set of new questions that could reshape the conversation around whose life, rights and thriving m...

African growth is a trend, not a fluke, says economist and former Finance Minister of Nigeria Ngozi Okonjo-Iweala. In this refreshingly candid and straightforward talk, Okonjo-Iweala describes the positive progress on the continent and outlines eight challenges African nations still need to address in order to create a better future.

Have we used up all our resources? Have we filled up all the livable space on Earth? Paul Gilding suggests we have, and the possibility of devastating consequences, in a talk that's equal parts terrifying and, oddly, hopeful.

Scared of superintelligent AI? You should be, says neuroscientist and philosopher Sam Harris -- and not just in some theoretical way. We're going to build superhuman machines, says Harris, but we haven't yet grappled with the problems associated with creating something that may treat us the way we treat ants.

Yang Lan, a journalist and entrepreneur who's been called "the Oprah of China," offers insight into the next generation of young Chinese citizens -- urban, connected (via microblogs) and alert to injustice.

"Ideas can and do change the world," says historian Rutger Bregman, sharing his case for a provocative one: guaranteed basic income. Learn more about the idea's 500-year history and a forgotten modern experiment where it actually worked -- and imagine how much energy and talent we would unleash if we got rid of poverty once and for all.

Why do girls feel empowered to engage in sexual activity but not to enjoy it? For three years, author Peggy Orenstein interviewed girls ages 15 to 20 about their attitudes toward and experiences of sex. She discusses the pleasure that's largely missing from their sexual encounters and calls on us to close the "orgasm gap" by talking candidly wit...

William Black is a former bank regulator who’s seen firsthand how banking systems can be used to commit fraud — and how “liar's loans” and other tricky tactics led to the 2008 US banking crisis that threatened the international economy. In this engaging talk, Black, now an academic, reveals the best way to rob a bank — from the inside.

Racism thrives on your silence and apathy, says human rights lawyer Dexter Dias. Telling the story of a harrowing UK court case that spotlights the corrosive effects of injustice, Dias urges us all to speak out and expose toxic myths about race -- in order to allow hope, change and justice to flourish.

Americanization and globalization have basically been the same thing for the last several generations. But the US's view of the world -- and the world's view of the US -- is changing. In a fast-paced tour of the current state of international politics, Ian Bremmer discusses the challenges of a world where no single country or alliance can meet t...

The developed world holds up the ideals of capitalism, democracy and political rights for all. Those in emerging markets often don't have that luxury. In this powerful talk, economist Dambisa Moyo makes the case that the west can't afford to rest on its laurels and imagine others will blindly follow. Instead, a different model, embodied by China...