 Now in Spencer’s case, especially by The Principles of Ethics (1879–93), this compossibility rested on a complex evolutionary moral psychology combining associationism, Lamarckian use-inheritance, intuitionism and utility. Pleasure-producing activity has tended to generate biologically inheritable associations between certain types of actions, pleasurable feelings and feelings of approval. Gradually, utilitarianism becomes  intuitive.[11]  And wherever utilitarian intuitions thrive, societies tend to be more vibrant as well as stable. Social evolution favors cultures that internalize utilitarian maxims intuitively. Conduct “restrained within the required limits [stipulated by the principle of equal freedom], calling out no antagonistic passions, favors harmonious cooperation, profits the group, and, by implications, profits the average of individuals.” Consequently, “groups formed of members having this adaptation of nature” tend “to survive and spread” (Spencer, vol. II, 1978: 43). Wherever general utility thrives, societies thrive. General utility and cultural stamina go hand-in-hand. And general utility thrives best where individuals exercise and develop their faculties within the parameters stipulated by equal freedom.