The elementary factors of Jeremy Bentham’s utilitarianism are principle of utility, principle of pleasure and pain and consequentialism. This thesis focuses on principles of pleasure and pain and principles of utility, which is closely related with the utilitarian moral principle in Hard Times. 《艰难时世》中功利主义对人性的影响(4):http://www.youerw.com/yingyu/lunwen_4290.html