The Kingdom of Alba was formed by the joining of the Scots and the Picts and led to the demise for the latter. However, the reason for the creation of this new kingdom is hotly debated. The man usually credited with this feat is the Scot, Kenneth Mac Alpin; although some believe that he was really a Pict. The fusing of Picts and Scots was largely due to the pressures of the Vikings who had taken over much land in the north and west, and had become a fearsome force in northern Britain. The Kingdom of Alba soon became known as Scotland, the name that it retains to this day.