Liberty is what people often mean by “freedom”. The freedom of “Free Culture” and “Free Software” is a matter of liberty, and is essentially liberal freedom, rather than a more radical freedom (such as anarchism).
“On Liberty” by John Stuart Mill (and the full text .)
“Two Concepts of Liberty” by Isaiah Berlin.
If anyone knows of any good writers on the subject more recent than Berlin, let me know. Opinion seems divided online. :-)
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