Open-source developers are motivated by personal development and building their reputation, according to Psychology Today. Which of course means that they're a self-serving, greedy bunch — just like the rest of us. If such self-interest leads to new software like the Firefox brower I'm using right now, good for us. And if fame-seeking keeps open-source developers from getting screwed over like Wikipedia users — who, according to Psychology Today, edit Jimmy Wales's comprehensive list of English soccer stars for more altruistic purposes — well, good for him. (Photo by jagelado)

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