You're reading: The Economist: Wikipedia is 20, and its reputation has never been higher

Lying drunk in a field outside the Austrian city of Innsbruck in 1971, inspiration struck Douglas Adams, a science-fiction writer. He looked at his copy of “The Hitchhiker’s Guide to Europe”, and then up at the stars, and came up with the idea for a “Hitchhiker’s Guide to the Galaxy”. It would be a (fictional) mixture of travel book and encyclopedia, but with an absurd-seeming twist: instead of being written by experts, anyone could contribute.

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