How did Scandinavian invasions affect the preservation of early Irish literature?

The Scandinavian invasions of the 9th and 10th centuries significantly disrupted literary studies in Ireland, which hindered the preservation of early Irish literature. Because these invasions caused widespread instability, the systematic collection and recording of oral traditions in monasteries were interrupted, leading to the imperfect preservation of many early sagas.1

It was not until the 11th century, when life in Ireland became sufficiently settled, that the collection of these works resumed, though this process appears to have been haphazard. Despite this disruption, the impact of the Viking wars also fostered a closer association between Latin civilization and Gaelic culture, which eventually influenced the development of Irish literary works as they began to replace Latin products in the Christian schools.12