Full Idea
A constitution providing for the greatest human freedom according to laws that permit the freedom of each to exist together with that of others is at least a necessary idea.
Gist of Idea
An obvious idea is a constitution based on maximum mutual freedom for citizens
Source
Immanuel Kant (Critique of Pure Reason [1781], B373/A316)
Book Reference
Kant,Immanuel: 'Critique of Pure Reason', ed/tr. Guyer,P /Wood,A W [CUO 1998], p.397
A Reaction
The basis of Mill's 'On Liberty'. Given that he claims it to be a necessary idea, it is strikingly characteristic of the Enlightenment, and not the sort of thing that occurred to people in 1320. Individual freedom acquired a value. John Lilburne?