Proprietary software aggravates selfishness. Of course, people do have a
selfish side, but that's not the full story, although business will tell you
otherwise. Free software doesn't ask you to be unselfish. It asks you to be
selfish in a non-harmful way. It never forces you to be kind and altruistic.
It _allows_ you to be kind and altruistic. Most people will want to help
friends once in a while, and free software allows it. Proprietary software
doesn't, and that's not a good thing for cooperation in society.
	-- Richard M. Stallman, http://www.kde.org/history/rms.php