The ubiquitous critic -- Happiness -- Reason and knowledge -- The God of the Christians impeached -- Revealed religion -- Christian apologetics -- The growth of unbelief; Jansenism; the expulsion of the Jesuits -- Natural religion -- Natural science -- Law -- Morals -- Government -- Education -- The Encyclopaedia -- The world of letters and ideas -- Ideas and manners -- "Becoming" -- Nature and reason -- Nature and goodness : optimism -- Natural politics and enlightened despotism -- Nature and freedom : laws are necessary relations deriving from the nature of things -- Sentiment; uneasiness; potencia sensitiva en el ombre -- The feelings : the primitive and the civilized -- Diderot -- The various deisms : Bolingbroke and Pope -- Deisms : Voltaire -- Deisms : Lessing -- Europe : the true and the false.