This essay examines D. G. Ritchie's claim that Principally, it endeavours to determine what Ritchie means by and what kind of utilitarianism he thinks evolutionary theory vindicates. With respect to the kind of utilitarianism vindicated, I will show how he tries to fortify Millian liberal utilitarianism with new liberal values such as self-realization and common good. Ritchie's intellectual debts were eclectic and included mostly Mill, T. H. Green, Hegel and Herbert Spencer.