Creative Commons was founded in 2001 to develop legal tools that enable sharing and reuse of creativity and knowledge. Their main solution is a set of copyright licenses that allow creators to select which rights they wish to reserve and which permissions they want to grant, providing a standardized way to give broad permissions for others to legally share, use, and build upon creative works. The licenses address the problems with traditional "all rights reserved" copyright that makes sharing and collaboration online difficult, by offering creators an alternative of "some rights reserved" and lowering transaction costs for the public seeking to make use of licensed works.