Today nine nations collectively control more than 15,000 nuclear weapons, each hundreds of times more powerful than those dropped on Hiroshima and Nagasaki. We don't need more nuclear weapons; we need a new generation to face the unfinished challenge of disarmament started decades ago. Nuclear reformer Erika Gregory calls on today's rising leaders -- those born in a time without Cold War fears and duck-and-cover training -- to pursue an ambitious goal: ridding the world of nuclear weapons by 2045.
With words like shards of glass, Chinaka Hodge cuts open 2016 and lets 12 months of violence, grief, fear, shame, courage and hope spill out in this original poem about a year none of us will soon forget.
The path to better medicine is paved with accidental yet revolutionary discoveries. In this well-told tale of how science happens, neuroscientist Rebecca Brachman shares news of a serendipitous breakthrough treatment that may prevent mental disorders like depression and PTSD from ever developing. And listen for an unexpected -- and controversial -- twist.
There are 168 hours in each week. How do we find time for what matters most? Time management expert Laura Vanderkam studies how busy people spend their lives, and she's discovered that many of us drastically overestimate our commitments each week, while underestimating the time we have to ourselves. She offers a few practical strategies to help find more time for what matters to us, so we can "build the lives we want in the time we've got."
As a black woman from a tough part of the Bronx who grew up to attain all the markers of academic prestige, Dena Simmons knows that for students of color, success in school sometimes comes at the cost of living authentically. Now an educator herself, Simmons discusses how we might create a classroom that makes all students feel proud of who they are. "Every child deserves an education that guarantees the safety to learn in the comfort of one's own skin," she says.
"The actual path of a raindrop as it goes down the valley is unpredictable, but the general direction is inevitable," says digital visionary Kevin Kelly -- and technology is much the same, driven by patterns that are surprising but inevitable. Over the next 20 years, he says, our penchant for making things smarter and smarter will have a profound impact on nearly everything we do. Kelly explores three trends in AI we need to understand in order to embrace it and steer its development. "The most popular AI product 20 years from now that everyone uses has not been invented yet," Kelly says. "That means that you're not late."
Science is a learning process that involves experimentation, failure and revision -- and the science of medicine is no exception. Cancer researcher Kevin B. Jones faces the deep unknowns about surgery and medical care with a simple answer: honesty. In a thoughtful talk about the nature of knowledge, Jones shows how science is at its best when scientists humbly admit what they do not yet understand.
At a moment when the world seems to be spinning out of control, religion might feel irrelevant -- or like part of the problem. But Rabbi Sharon Brous believes we can reinvent religion to meet the needs of modern life. In this impassioned talk, Brous shares four principles of a revitalized religious practice and offers faith of all kinds as a hopeful counter-narrative to the numbing realities of violence, extremism and pessimism.
How do we define a parent -- or a family? Bioethicist Veerle Provoost explores these questions in the context of non-traditional families, ones brought together by adoption, second marriages, surrogate mothers and sperm donations. In this talk, she shares stories of how parents and children create their own family narratives.
In a lyrical, unexpectedly funny talk about heavy topics such as frayed relationships and the death of a loved one, Elizabeth Lesser describes the healing process of putting aside pride and defensiveness to make way for soul-baring and truth-telling. "You don't have to wait for a life-or-death situation to clean up the relationships that matter to you," she says. "Be like a new kind of first responder ... the one to take the first courageous step toward the other."
Our lives depend on a world we can't see: the satellite infrastructure we use every day for information, entertainment, communication and so much more. But Earth orbit isn't a limitless resource, and the problem of space debris will get worse without a significant change to our behavior. Natalie Panek challenges us to consider the environmental impact of the satellites we rely on. Our orbital environment is breathtakingly beautiful and our gateway to exploration, she says. It's up to us to keep it that way.
Jia Jiang adventures boldly into a territory so many of us fear: rejection. By seeking out rejection for 100 days -- from asking a stranger to borrow $100 to requesting a "burger refill" at a restaurant -- Jiang desensitized himself to the pain and shame that rejection often brings and, in the process, discovered that simply asking for what you want can open up possibilities where you expect to find dead ends.
Soap operas and telenovelas may be (ahem) overdramatic, but as Kate Adams shows us, their exaggerated stories and characters often cast light on the problems of real life. In this sparkling, funny talk, Adams, a former assistant casting director for "As the World Turns," share four lessons for life and business that we can learn from melodramas.
Urban planner Ryan Gravel shares the story of how his hometown of Atlanta, Georgia, rallied to build a massive urban park that will transform an abandoned railroad track into 22 miles of public green space called the Atlanta BeltLine. The places we live aren't inevitable, he says -- and if we want something different, we need to speak up.
Love is a tool for revolutionary change and a path toward inclusivity and understanding for the LGBTQ+ community. Married activists Tiq and Kim Katrin Milan have imagined their marriage -- as a transgender man and cis woman -- a model of possibility for people of every kind. With infectious joy, Tiq and Kim question our misconceptions about who they might be and offer a vision of an inclusive, challenging love that grows day by day.
Born out of a social media post, the Black Lives Matter movement has sparked discussion about race and inequality across the world. In this spirited conversation with Mia Birdsong, the movement's three founders share what they've learned about leadership and what provides them with hope and inspiration in the face of painful realities. Their advice on how to participate in ensuring freedom for everybody: join something, start something and "sharpen each other, so that we all can rise."
Joe Lassiter is a deep thinker and straight talker focused on developing clean, secure and carbon-neutral supplies of reliable, low-cost energy. His analysis of the world's energy realities puts a powerful lens on the stubbornly touchy issue of nuclear power, including new designs for plants that can compete economically with fossil fuels. We have the potential to make nuclear safer and cheaper than it's been in the past, Lassiter says. Now we have to make the choice to pursue it.
We can evolve bacteria, plants and animals -- futurist Juan Enriquez asks: Is it ethical to evolve the human body? In a visionary talk that ranges from medieval prosthetics to present day neuroengineering and genetics, Enriquez sorts out the ethics associated with evolving humans and imagines the ways we'll have to transform our own bodies if we hope to explore and live in places other than Earth.
Speaking up is hard to do, even when you know you should. Learn how to assert yourself, navigate tricky social situations and expand your personal power with sage guidance from social psychologist Adam Galinsky.
Necessity is the mother of invention, right? Well, not always. Steven Johnson shows us how some of the most transformative ideas and technologies, like the computer, didn't emerge out of necessity at all but instead from the strange delight of play. Share this captivating, illustrated exploration of the history of invention. Turns out, you'll find the future wherever people are having the most fun.
Now more than ever, it's important to look boldly at the reality of race and gender bias -- and understand how the two can combine to create even more harm. Kimberlé Crenshaw uses the term "intersectionality" to describe this phenomenon; as she says, if you're standing in the path of multiple forms of exclusion, you're likely to get hit by both. In this moving talk, she calls on us to bear witness to this reality and speak up for victims of prejudice.
Women's equality won't just happen -- not unless more women are put in positions of power, says Sandi Toksvig. In a disarmingly hilarious talk, Toksvig tells the story of how she helped start a new political party in Britain, the Women's Equality Party, with the express purpose of putting equality on the ballot. Now she hopes people around the world will copy her party's model and mobilize for equality.
Five years ago, TED Fellow Jennifer Brea became progressively ill with myalgic encephalomyelitis, commonly known as chronic fatigue syndrome, a debilitating illness that severely impairs normal activities and on bad days makes even the rustling of bed sheets unbearable. In this poignant talk, Brea describes the obstacles she's encountered in seeking treatment for her condition, whose root causes and physical effects we don't fully understand, as well as her mission to document through film the lives of patients that medicine struggles to treat.
Say hello to the decentralized economy -- the blockchain is about to change everything. In this lucid explainer of the complex (and confusing) technology, Bettina Warburg describes how the blockchain will eliminate the need for centralized institutions like banks or governments to facilitate trade, evolving age-old models of commerce and finance into something far more interesting: a distributed, transparent, autonomous system for exchanging value.
How can the US recover after the negative, partisan presidential election of 2016? Social psychologist Jonathan Haidt studies the morals that form the basis of our political choices. In conversation with TED Curator Chris Anderson, he describes the patterns of thinking and historical causes that have led to such sharp divisions in America -- and provides a vision for how the country might move forward.
Before soldiers are sent into combat, they're trained on how to function in an immensely dangerous environment. But they also need training on how to return from the battlefield to civilian life, says psychologist Hector Garcia. Applying the same principles used to prepare soldiers for war, Garcia is helping veterans suffering from PTSD get their lives back.
TED Resident Fawn Qiu designs fun, low-cost projects that use familiar materials like paper and fabric to introduce engineering to kids. In this quick, clever talk, she shares how nontraditional workshops like hers can change the perception of technology and inspire students to participate in creating it.
On February 10, 2015, Suzanne Barakat's brother Deah, her sister-in-law Yusor and Yusor's sister Razan were murdered by their neighbor in Chapel Hill, North Carolina. The perpetrator's story, that he killed them over a traffic dispute, went unquestioned by the media and police until Barakat spoke out at a press conference, calling the murders what they really were: hate crimes. As she reflects on how she and her family reclaimed control of their narrative, Barakat calls on us to speak up when we witness hateful bigotry and express our allyship with those who face discrimination.
With warmth and wit, Halla Tómasdóttir shares how she overcame media bias, changed the tone of the political debate and surprised her entire nation when she ran for president of Iceland -- inspiring the next generation of leaders along the way. "What we see, we can be," she says. "It matters that women run."
Unlock the mysteries and inner workings of the world through one of the most imaginative art forms ever -- mathematics -- with Roger Antonsen, as he explains how a slight change in perspective can reveal patterns, numbers and formulas as the gateways to empathy and understanding.