The term 'Spirit of the Time' is often used to refer to the ZEITGEIST, which is a German word meaning 'the spirit of the age'. It is used to describe the prevailing attitudes, beliefs, and values that characterize a particular period of time. The concept of ZEITGEIST is closely related to the idea of cultural evolution, as it suggests that the collective consciousness of a society changes over time. The term is often used to explain why certain ideas become popular during certain periods of history.