The Doctrine of the Will by Asa Mahan is possibly MahanÕs best book. It is a satisfactory rebuttal to the doctrine of the Necessitarians, specifically the Edwardian kind, who taught that the will operated under the law of necessity rather than liberty. Revivalist and theologian Charles Finney said that this classic was Òa highly important workÓ that Òevery family should possess and make themselves familiar with.Ó