What term represents a major idea broad enough to encompass the entire scope of a literary work?

The concept that encapsulates a major idea broad enough to encompass the entire scope of a literary work is referred to as the theme. The theme is essentially the underlying message or central insight that the author conveys through characters, plot, and other elements of the story. It reflects the author's perspective on fundamental aspects of life, society, or the human experience, which can resonate with readers on various levels.

Themes can be universal, addressing issues such as love, conflict, morality, or identity, allowing for deeper understanding and reflection. In contrast, a motif is a recurring element, such as a symbol or a phrase, that supports the theme but does not represent it entirely. An argument refers to a claim or assertion made to persuade others and often pertains to non-fiction writing. Context involves the circumstances or background that surround a text but does not encapsulate a broad idea in the way a theme does.