When did the term navel-gazing come into the pop culture?

The term "navel-gazing" entered popular culture in the 1980s, initially used to describe excessive self-reflection or introspection, often in a critical context. It gained prominence as a metaphor for self-absorption, particularly in discussions about art and literature. Its usage expanded over the years to encompass broader themes of self-involvement in various aspects of life. The phrase continues to be relevant today in critiques of social media and contemporary culture.