Freedom to do whatever you want: - share, modify, distribute, improve, destroy, or whatever with the copy Except make it proprietary - you can't put restrictions on your modified or improved copy Free: - as in $0 - no payment necessary - even for distribution No money for me - whatever improvements you've made big or small you have to distribute it the same way you got it - you can't sell it Promotes innovation - more accessible to more people - more people can cooperate in improving the software, music, art, etc. - no more "uncooperative" people