By Linus Torvalds
In the book The Hacker Ethic and the Spirit of the Information Age (2001), Torvalds introduces his law in the prologue "What Makes Hackers Tick? a.k.a. Linus's Law", which is that every motivation that makes a man do something can be classified under "survival", "social life" and "entertainment." As a result, he writes, progress is defined as reaching a higher category: not doing a thing merely for survival, but for social reasons, and then, even better, just for fun.
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