- plural of
- 1994, Necip Fikri Alican, Mill's Principle of Utility: A Defense of John Stuart Mill's Notorious Proof, page 110:
- Notwithstanding the temptation to use familiar mathematical or sociopolitical models to explain Mill's elusive notion, the general happiness of a population is neither the sum total or arithmetic average of the several happinesses of individual persons in the population...
Happinesses is used when there are multiple forms or measures of happiness which are to be distinguished. Typically happiness is uncountable.