Due to problems in Ireland, most importantly a famine between 1845 and 1852, caused by the potatoes in Ireland being destroyed by disease, many Irish moved out of Ireland, including Great Britain, and to other countries like the United States, Canada, and Australia. At present, many more Irish live in the United States than in Ireland, with many of them living in large American cities such as Boston, New York, Philadelphia, and Chicago. The population of Irish people in the United States is over seven times more populated than that of those who live in the original homeland of Ireland.