Todd Stern (CAP) and William Antholis (Brookings): A Changing Climate: The Road Ahead for the United States. From For/Against, an article on Britain's Spanish colony: How languages combine when cultures clash; and here's an unappreciation of Zen and the Art of Motorcycle Maintenance. More and more on The New Black: Mourning, Melancholia and Depression by Darian Leader. On Facebook's fourth anniversary, a commencement address from someone who was there at the beginning. A look at how Friendster is moving to Asia. Nicholas Humphrey on questioning consciousness: To understand consciousness and its evolution, we need to ask the right questions. Research suggests language evolves in sudden leaps. From Sign and Sight, German historians are documenting the persecution and extermination of the Jews

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