'''''The Future of Ideas''''' ([[2001]]) is a publicationbook by [[Lawrence Lessig]], a professor of law at [[Stanford Law School]], who is well known as a critic of the extension of the [[copyright]] protection term.
In the book, he showed there are three layers of ideas: code layer, and content layer and physical layer.
CodeThe code layer is one that which is controledcontrolled by computer programmsprograms. TheCensorship censorshipin China by sorting out geographical IP address in Chinaaddresses is an instance.
ContentThe content layer is anotoriously notroiously knownillustrated by [[Napster]], a [[file sharing]] service. He Lessig criticized the reaction of music companies and [[Hollywood]].
PhysicalThe physical layer is the one that actually conveys information from one point to another point, and can be either wired or wireless. He dicussesdiscusses particularly about the regulation of the [[radio frequency|spectrum]] in the [[USA]].
