For 10 points, name this concept, the subject of a John Stuart Mill essay outlining the "harm principle."
Quentin Skinner claims to have found a 17th-century "neo-Roman" version of this concept. Gerald MacCallum critiqued an essay on this concept by arguing that it was a "triadic relation" between terms he denoted x, y, and z. Benjamin Constant contrasted the Ancients' view of this concept with its perception by the Moderns. A noted essay on this concept argues that a man who decides to train himself to cut off his wounded leg rather than healing it exemplifies a "retreat to the (*) inner citadel" and warns that treating this concept as "self-mastery" may lead to the "Temple of Sarastro." Charlemagne and Akbar are held up as examples of necessary despots in a different essay on this concept, which was divided into "positive" and "negative" forms by Isaiah Berlin. For 10 points, name this concept, the subject of a John Stuart Mill essay outlining the "harm principle."
Quentin Skinner claims to have found a 17th-century "neo-Roman" version of this concept.
liberty [or freedom, since the distinction is too vague to rule that out]