eudaemonism
noun
eu·dae·mo·nism yü-ˈdē-mə-ˌni-zəm 
variants or eudaimonism
yü-ˈdī-mə-ˌni-zəm
: a theory that the highest ethical goal is happiness and personal well-being
eudaemonist
yü-ˈdē-mə-nist
noun eudaemonistic
yü-ˌdē-mə-ˈni-stik
adjective 
Word History
Etymology
Greek eudaimonia happiness, from eudaimōn having a good attendant spirit, happy, from eu- + daimōn spirit — more at demon
First Known Use
1827, in the meaning defined above