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The Good Country Index measures how much each of 125 countries contributes to the planet. Announced today, the Index features some unexpected winners — and even more surprising losers. (Sorry, USA.)

The economist Sir Paul Collier has spent his career thinking about how to solve global poverty. So how are we doing? Well, not as badly as you might think. He describes the current state of the world and shares thoughts on where we might usefully focus next.

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Through his non-profit, TED Fellow Alexander McLean works to bring hope to men, women and children in prison in Kenya and Uganda. He talks about his work to change lives through healthcare, education, and access to justice.

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America’s war in Afghanistan has been its longest, arguably most grueling, and yet for 13 years also strangely invisible. Sebastian Junger’s work helps bring it back into focus — now with a new documentary, Korengal. We spoke to him about the project.

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All eyes on the Federal Communications Commission, as it unveils its “Open Internet” proposal. So-called net neutrality is a complicated topic involving regulation, politicking and jargon, so we called on technology writer and observer Clay Shirky to share his take on what’s going on.

David Sengeh tinkers with his design for a 3D-printed prosthetic socket. Photo: Allegra Boverman.

Growing up in Sierra Leone, David Sengeh knew all too many amputees. Now studying at the MIT Media Lab, he talks about his idea of redesigning the socket that connects an artificial limb to a human body — and his dream of creating custom-designed, low-cost, comfortable sockets that 3D printing technology could make accessible to anyone, anywhere.

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Think parents should be able to select their children’s talents and personalities? Or want to run and hide in the woods at the thought of it? Whatever your opinion, it is precisely the kind of question that Julian Savulescu wants you to take seriously.