Britain didn’t cause the blight. That was the work of an airborne pathogen that worked its way across northern Europe, Britain, and Ireland from 1844 to 1845. The failure of the potato crop was not Britain’s doing, but the Famine was. Since 1801, with the Act of Union of Britain and Ireland, the British government in London had systematically reduced the economy of Ireland and destroyed its native industries in order to reduce competition. Union with England makes countries poorer because union with England has always been to England’s benefit.