The Great Famine (Irish: an Gorta Mór) or the Great Hunger was a period of mass starvation, disease, and emigration in Ireland between 1845 and 1852. It is sometimes referred to, mostly outside Ireland, as the Irish Potato Famine, because about two-fifths of the population was solely reliant on this cheap crop for a number of historical reasons. During the famine, approximately 1 million people died and a million more emigrated from Ireland, causing the island's population to fall by between 20% and 25%.