It seems like for about 200 years the Vikings just kept sailing to Britain and pillaging everything. I could understand it more if they wanted to conquer (which, I realise, they eventually did decide to do), but for most of those 200 years they were just plundering and murdering. They weren't even stealing from rich lords and noblemen, they were mostly just burning peasant villages and destroying monasteries and taking slaves. Every time anyone tried to create anything or learn anything or write anything or have any sort of peace for 200 years, the bloody Vikings would sail up, destroy everything, and then sail home again.