The author proposes a method of verification for moral statements. (staff).

This lecture insisted upon negative liberty as the political complement to the human capacity for free choice, and made matching metaphysical claims: the nature of being, and especially the conflicts amongst values, were inconsistent with totalitarian claims. Berlin, arguing along this line, provided an account of the perversion of positive liberty into a warrant for such claims, discussed nationalism, and emphasized the value‐pluralism, now linked so frequently with his name.