Neal Stephenson is a visionary. One of the world’s premier authors of science fiction, he sees both visions and a future that are unlike any most of us will ever imagine. At times, they find their way into his remarkable books—especially his latest and most dramatic, Seveneves, due out in May from William Morrow. At other times, we are enriched by his thinking about future realities, which he is quite careful to distinguish from his fiction. Four years ago, Stephenson bemoaned in our Innovation issue the lack of any recent invention that had altered our core landscape. This time, he’s joined World Policy Journal editor & publisher David A. Andelman and managing editor Yaffa Fredrick in our Chat Room to reflect on the The Unknown.

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