In general, Islamic banking and finance has been described as having the "same purpose" as conventional banking but operating in accordance with the rules of shariah law (Institute of Islamic Banking and Insurance), or having the same "basic objective" as other private entities, i.e. "maximization of shareholder wealth" (Mohamed Warsame). In a similar vein, Mahmoud El-Gamal states that Islamic finance "is not constructively built from classical jurisprudence". It follows conventional banking and deviates from it "only insofar as some conventional practices are deemed forbidden under Sharia."