The biggest substantive difference between Bentham and Mill with regards to utilitarianism wasa. Should we push the fat man in f
ront of the trolley?b. Should we maximize our pleasure or the happiness of others?c. Are some pleasures more valuable than others even if they feel less pleasurable?d. Does the end justify the means?
Slate is much more commonly found in wet areas, especially around rivers in the United States, so it wouldn't be very available to Natives who were more inland.