Why do historians debate whether the Icelanders’ sagas are reliable historical sources?

Historians debate the reliability of the Icelanders’ sagas primarily because of uncertainty regarding their origins and the authors' intentions. While these narratives provide valuable insights into the social and cultural environment of early Iceland, they are also works of literature that prioritize aesthetic goals over strict historical documentation.12

The debate centers on two main theories of composition:
* Individual Authorship: Some scholars argue that the sagas were written by 13th-century authors who used their artistic skill to create complex, unified narratives about the past.1
* Oral Tradition: Others contend that the stories were composed orally near the time of the events they describe and were preserved through oral tradition for centuries before being transcribed.1

Because the sagas often blend historical information with fictional elements to achieve dramatic power or convey a specific ethos, it is difficult to determine how much of the content is factual. Ultimately, while the sagas are essential for understanding the "grim ethos" of a vanished way of life, their status as historical sources remains complex due to the intentional fictionalization of the past by their creators.12