Edited sentence: An example often brought by Richard Stallman (founder of the Free Software Foundation) is that with todays copyright law, we would not have the works of Shakespear, because most art, information or invention is based on the work of others, they are often variations or developments upon them.In fact society needs certain freedom in usage of such material in order to create new material.Severe restrictions on usage, manipulation and publication of information or art as stated in DMCA or executed by DRM are neither a contribution to the artists or authors nor to society.So by restricting the society in what society can do with the work society has created, the industry is blocking further development.They are solely contribution to the industrie who usually holds the rights on that information or art