<human>:  How did the Vikings contribute to history?
<bot>: The Vikings were an important part of European history and had a significant influence on the development of many nations. They were renowned explorers, traders, and settlers who ventured out from their Scandinavian homeland and eventually settled in regions throughout Europe, North America, and the British Isles. They brought about major political and social changes, such as the establishment of the first European parliamentary system in England, the founding of cities such as Dublin, and the introduction of an alphabet based on Latin script that is still used today.