"The Free Software Foundation has defined Four Freedoms related to software. These freedoms apply to users of software, not necessarily developers. In the view of the FSF, these freedoms are ethical in nature, so much so that they argue that software which violates these freedoms is unethical.
"Like many other rights, the four freedoms are specific expressions of abstract freedoms in the context of software. They represent concrete examples of underlying notions of freedom. You can see this principle if you ask 'Why should I be able to run my own printing press or weblog...?'"
