Let’s design social media that drives real challenge| Wael Ghonim

Wael Ghonim helped touch off the Arab Spring in his home of Egypt … by setting up a simple Facebook page. As he reveals, once the revolution spilled onto the streets, it turned from hopeful to messy, then ugly and heartbreaking. And social media followed suit. What was once a place for crowdsourcing, engaging and sharing became a polarized battleground. Ghonim asks: What can we do about online behavior now? How can we use the Internet and social media to create civility and reasoned argument?

10 Ways to have a better conversation | Celeste Headlee

When your job hinges on how well you talk to people, you learn a lot about how to have conversations — and that most of us don’t converse very well. Celeste Headlee has worked as a radio host for decades, and she knows the ingredients of a great conversation: Honesty, brevity, clarity and a healthy amount of listening. In this insightful talk, she shares 10 useful rules for having better conversations. “Go out, talk to people, listen to people,” she says. “And, most importantly, be prepared to be amazed.”

For argument’s sake | Daniel Cohen

Why do we argue? To out-reason our opponents, prove them wrong, and, most of all, to win! Right? Philosopher Daniel H. Cohen shows how our most common form of argument — a war in which one person must win and the other must lose — misses out on the real benefits of engaging in active disagreement.

The Puzzle of Motivation | Dan Pink

Career analyst Dan Pink examines the puzzle of motivation, starting with a fact that social scientists know but most managers don’t: Traditional rewards aren’t always as effective as we think. Listen for illuminating stories — and maybe, a way forward.

We can reprogram life. How to do it wisely | Juan Enriquez

For four billion years, what lived and died on Earth depended on two principles: natural selection and random mutation. Then humans came along and changed everything — hybridizing plants, breeding animals, altering the environment and even purposefully evolving ourselves. Juan Enriquez provides five guidelines for a future where this ability to program life rapidly accelerates. “This is the single most exciting adventure human beings have been on,” Enriquez says. “This is the single greatest superpower humans have ever had.”

Wireless data from every light bulb | Harald Haas

What if every light bulb in the world could also transmit data? At TEDGlobal, Harald Haas demonstrates, for the first time, a device that could do exactly that. By flickering the light from a single LED, a change too quick for the human eye to detect, he can transmit far more data than a cellular tower — and do it in a way that’s more efficient, secure and widespread.