In Depth The place for open source in the wider ethical, economic and religious world
http://www.techradar.com/news/software/the-philosophy-of-free-software-1119579
"Having mentioned Linus Torvalds' interview with the BBC, let's start there. In it, he said "…open source only really works if everybody is doing it for their own selfish reasons… the fundamental property of the GPL v2 is a very simple 'tit-for-tat' model: I'll give you my improvements, if you promise to give your improvements back." "
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