Google.org director Larry Brilliant uses a clip from an old Frank Capra movie to show that we’ve known about global warming for 50 years — yet in half a century, we’ve done almost nothing to solve it. He explores this and other megatrends that could inspire pessimism. But, he says, there is a more powerful case for optimism.

Have you read the breakthrough novel of the year? When you are done with that, try:

In Search of Sungudogo by Greg Laden, now in Kindle or Paperback
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