Olympianism
/əˈlɪmpɪənɪz(ə)m/noun
1The polytheistic religious system of the ancient Greeks, in which the Olympians were the chief gods and goddesses. In extended use: any polytheistic religious system.
2An attitude or demeanour of godlike power, superiority, or personal excellence.
Origin
Late 19th century; earliest use found in The North American Review. From Olympian + -ism.