Full Idea
The idea of a right seems to be as basic as any other; we might even define justice in terms of it, as the disposition to accord to every person his rights.
Gist of Idea
The idea of a right seems fairly basic; justice may be the disposition to accord rights to people
Source
Roger Scruton (A Dictionary of Political Thought [1982], 'rights')
Book Reference
Scruton,Roger: 'A Dictionary of Political Thought' [Pan 1983], p.409
A Reaction
I am inclined to think that a set of fairly pure values (such as equality, kindness, sympathy, respect) must be in place before the idea of a right would occur to anyone. Aristotle has a powerful moral sense, but rights for slaves don't cross his mind.