In practice, in the real world rather than the mythical world of ideologies, a “democracy” means a political system in which there exists “liberty”: that is, what Mosca calls “juridical defense,” a measure of security for the individual which protects him from the arbitrary and irresponsible exercise of personally held power. Liberty or juridical defense, moreover, is summed up and focused in the right of opposition, the right of opponents of the currently governing élite to express publicly their opposition views and to organize to implement those views.