<P>This book explores software's pivotal role as the code that powers computers, mobile devices, the Internet, and social media. Creating conditions for the ongoing development and use of software, including the Internet as a communications infrastructure, is one of the most compelling issues of our time. Free software is based upon open source code, developed in peer communities as well as corporate settings, challenging the dominance of proprietary software firms and promoting the digital commons. Drawing upon key cases and interviews with free software proponents based in Europe, Brazil and the U.S., the book explores pathways toward creating the digital commons and examines contemporary political struggles over free software, privacy and civil liberties on the Internet that are vital for the commons' continued development.</P>