It seems the more we know about how democracy works -- through government transparency, better media coverage, even new insights about our brains -- the less we trust democracy itself. Yet it's still, arguably, the best system of government available. As Ivan Krastev says, "What went right is also what went wrong." Can democracy survive?
The open-source world has learned to deal with a flood of new, oftentimes divergent, ideas using hosting services like GitHub -- so why can’t governments? In this rousing talk Clay Shirky shows how democracies can take a lesson from the Internet, to be not just transparent but also to draw on the knowledge of all their citizens.
When a freak tornado hit their hometown, sisters Caitria and Morgan O'Neill -- just 20 and 24 at the time -- realized they had to jump in and help. What they learned is: After a natural disaster, there's only a tiny window before the world turns its sympathy (and its donations) elsewhere -- so it's important to be prepared for every aspect of recovery. Watch this talk to learn how to step up in a timely fashion for your own community.
Is there a definitive line that divides crazy from sane? With a hair-raising delivery, Jon Ronson, author of The Psychopath Test, illuminates the gray areas between the two. (With live-mixed sound by Julian Treasure and animation by Evan Grant.)
Can an algorithm forecast the site of the next riot? In this accessible talk, mathematician Hannah Fry shows how complex social behavior can be analyzed and perhaps predicted through analogies to natural phenomena, like the patterns of a leopard's spots or the distribution of predators and prey in the wild.
How do you deal with a bully without becoming a thug? In this wise and soulful talk, peace activist Scilla Elworthy maps out the skills we need -- as nations and individuals -- to fight extreme force without using force in return. To answer the question of why and how nonviolence works, she evokes historical heroes -- Aung San Suu Kyi, Mahatma Gandhi, Nelson Mandela -- and the personal philosophies that powered their peaceful protests.
Photographer Lisa Kristine travels the world documenting the unbearably harsh realities of modern-day slavery. She shares hauntingly beautiful images -- miners in the Congo, bricklayers in Nepal -- that illuminate the plight of the 27 million souls enslaved worldwide.
What should a community do with its unused land? Plant food, of course. With energy and humor, Pam Warhurst tells at the TEDSalon the story of how she and a growing team of volunteers came together to turn plots of unused land into communal vegetable gardens, and to change the narrative of food in their community.
Art historian Bahia Shehab has long been fascinated with the Arabic script for 'no.' When revolution swept through Egypt in 2011, she began spraying the image in the streets saying no to dictators, no to military rule and no to violence.
Parkinson's disease affects 6.3 million people worldwide, causing weakness and tremors, but there's no objective way to detect it early on. Yet. Applied mathematician and TED Fellow Max Little is testing a simple, cheap tool that in trials is able to detect Parkinson's with 99 percent accuracy -- in a 30-second phone call.
Most people instinctively avoid conflict, but as Margaret Heffernan shows us, good disagreement is central to progress. She illustrates (sometimes counterintuitively) how the best partners aren’t echo chambers -- and how great research teams, relationships and businesses allow people to deeply disagree.
In the wake of the 2011 Japanese earthquake and tsunami, mixed into the wreckage were lost and damaged photos of families and loved ones. Photo retoucher Becci Manson, together with local volunteers and a global group of colleagues she recruited online, helped clean and fix them, restoring those memories to their owners.
Daphne Koller is enticing top universities to put their most intriguing courses online for free -- not just as a service, but as a way to research how people learn. With Coursera (cofounded by Andrew Ng), each keystroke, quiz, peer-to-peer discussion and self-graded assignment builds an unprecedented pool of data on how knowledge is processed.
A whirlwind of energy and ideas, Stephen Ritz is a teacher in New York's tough South Bronx, where he and his kids grow lush gardens for food, greenery -- and jobs. Just try to keep up with this New York treasure as he spins through the many, many ways there are to grow hope in a neighborhood many have written off, or in your own.
Giles Duley gave up a life of glamour and celebrity as a fashion photographer to travel the world and document the stories of the forgotten and marginalized. While on assignment in Afghanistan he stepped on a landmine, a horrific event that left him a triple amputee. In this moving talk Duley tells us stories of lives lost and found -- including his.
We all use our body on a daily basis, and yet few of us think about our physicality the way Wayne McGregor does. He demonstrates how a choreographer communicates ideas to an audience, working with two dancers to build phrases of dance, live and unscripted, on the TEDGlobal stage.
Mark Applebaum writes music that breaks the rules in fantastic ways, composing a concerto for a florist and crafting a musical instrument from junk and found objects. This quirky talk might just inspire you to shake up the "rules" of your own creative work.
Rob Legato creates movie effects so good they (sometimes) trump the real thing. In this warm and funny talk, he shares his vision for enhancing reality on-screen in movies like Apollo 13, Titanic and Hugo.
Michael Anti (aka Jing Zhao) has been blogging from China for 12 years. Despite the control the central government has over the Internet -- "All the servers are in Beijing" -- he says that hundreds of millions of microbloggers are in fact creating the first national public sphere in the country's history, and shifting the balance of power in unexpected ways.
Bees have been rapidly and mysteriously disappearing from rural areas, with grave implications for agriculture. But bees seem to flourish in urban environments -- and cities need their help, too. Noah Wilson-Rich suggests that urban beekeeping might play a role in revitalizing both a city and a species.
When Tracy Chevalier looks at paintings, she imagines the stories behind them: How did the painter meet his model? What would explain that look in her eye? Why is that man ... blushing? She shares three stories inspired by portraits, including the one that led to her best-selling novel "Girl With a Pearl Earring."
Ramesh Raskar presents femto-photography, a new type of imaging so fast it visualizes the world one trillion frames per second, so detailed it shows light itself in motion. This technology may someday be used to build cameras that can look “around” corners or see inside the body without X-rays.
Inspired by cell division, Michael Hansmeyer writes algorithms that design outrageously fascinating shapes and forms with millions of facets. No person could draft them by hand, but they're buildable -- and they could revolutionize the way we think of architectural form.
What kind of data is your cell phone company collecting? Malte Spitz wasn’t too worried when he asked his operator in Germany to share information stored about him. Multiple unanswered requests and a lawsuit later, Spitz received 35,830 lines of code -- a detailed, nearly minute-by-minute account of half a year of his life.
Computer science began in the '30s ... the 1830s. John Graham-Cumming tells the story of Charles Babbage's mechanical, steam-powered "analytical engine" and how Ada Lovelace, mathematician and daughter of Lord Byron, saw beyond its simple computational abilities to imagine the future of computers.
Two-thirds of the world may not have access to the latest smartphone, but local electronic shops are adept at fixing older tech using low-cost parts. Vinay Venkatraman explains his work in "technology crafts," through which a mobile phone, a lunchbox and a flashlight can become a digital projector for a village school, or an alarm clock and a mouse can be melded into a medical device for local triage.
Matt Mills and Tamara Roukaerts demonstrate Aurasma, a new augmented reality tool that can seamlessly animate the world as seen through a smartphone. Going beyond previous augmented reality, their "auras" can do everything from making a painting talk to overlaying live news onto a printed newspaper.
Over the years, research has shown a counterintuitive fact about human nature: Sometimes, having too much choice makes us less happy. This may even be true when it comes to medical treatment. Baba Shiv shares a fascinating study that measures why choice opens the door to doubt, and suggests that ceding control -- especially on life-or-death decisions -- may be the best thing for us.
Imagine global security driven by collaboration -- among agencies, government, the private sector and the public. That's not just the distant hope of open-source fans, it's the vision of James Stavridis, a US Navy Admiral. Stavridis shares vivid moments from recent military history to explain why security of the future should be built with bridges rather than walls.