Word Study
eudemonism
CIDE DICTIONARY
eudemonism, n. [Gr. a thinking happy, fr, blessed with a good genius, happy; e'y^ well, good + one's demon of genius. See Demon.].
That system of ethics which defines and enforces moral obligation by its relation to happiness or personal well-being.
OXFORD DICTIONARY
eudemonism, n. (also eudaemonism) a system of ethics that bases moral obligation on the likelihood of actions producing happiness.
Derivative
eudemonist n. eudemonistic adj.
Etymology
Gk eudaimonismos system of happiness f. eudaimon happy (as EU-, daimon guardian spirit)
For further exploring for "eudemonism" in Webster Dictionary Online