Where did on top of the world come from?

The phrase "on top of the world" is often used to express a feeling of great happiness or success. Its origins can be traced back to early 20th-century literature and music, notably in the 1930 song "On Top of the World" by the popular band The Carpenters in the 1970s. The imagery evokes a sense of elevation and achievement, suggesting that one feels unbeatable or in a perfect state. Over time, it has become a common idiom in English, symbolizing feelings of elation and triumph.