The Vikings did not disappear, but they assimilated into many of the countries, cultures, and civilizations that they had raided, traded, and settled in. After the Viking age, the Northmen continued living their lives in the Scandinavian countries, and in the settlements created during the Viking age, such as Iceland and Greenland. The Viking age ended when the raids stopped, and changes took place in European societies that made raiding less profitable and less desirable. The Vikings gradually became Christians, and the Medieval Church had declared that Christians should not own other Christians as slaves. This made raiding parties on nearby Christian lands much less profitable. The majority of Viking society was employed in agricultural work, and only a small proportion of men were sent over the seas to raid, trade, and settle. The Vikings developed a presence throughout the Western hemisphere from the late 8th to the early 12th centuries CE, but by the latter stage of this period, the once fearsome Viking warriors had ceased to exist in.