This Text Gives A General Theory Of Rational Belief. Although It Can Be Read By Itself, Is A Sequel To The Author's Previous Book 'the Value Of Rationality'. It Takes The General Conception Of Rationality That Was Defended In That Earlier Book, And Combines It With An Account Of The Varieties Of Belief, And Of What It Is For These Beliefs To Count As 'correct', To Develop An Account Of What It Is For Beliefs To Count As Rational. Ralph Wedgwood. Also Issued In Print: 2023. Includes Bibliographical References And Index.