Here's why:
* Central Theme: Romance stories often revolve around finding love and commitment, which often culminates in marriage. This act symbolizes the hero's acceptance into a new family, community, and often, a higher social standing.
* Happy Ending: Marriage is often seen as the "happily ever after" in romance, signifying the hero's successful integration into a stable and loving environment.
* Social Expectations: Many romance novels address societal pressures and expectations around marriage, and how the hero navigates those pressures.
While marriage can be a significant event in other genres, such as:
* Fantasy: Marriage might be used for political alliances, to secure power, or to fulfill ancient prophecies.
* Historical Fiction: Marriage can be a strategic move for social advancement, economic stability, or to maintain family traditions.
* Contemporary: Marriage can represent personal growth, emotional maturity, or a commitment to a long-term partnership.
It's in Romance where the hero's marriage is most frequently depicted as a direct reflection of their inclusion in society and the achievement of a fulfilling personal life.