The new Home Government Association was founded by Isaac Butt in 1870, who died in 1879. William Shaw presided over the convention held to found its successor, the Home Rule League, of which he was chairman. He was followed by Charles Stewart Parnell, the founder of the Irish Parliamentary Party (IPP). H. H. Asquith called Parnell one of the most important men of the nineteenth century and Lord Haldane called him the most powerful man that the Parliament of the United Kingdom of Great Britain and Ireland had seen in 150 years. Parnell led the Gladstonian constitutionalist Home Rule movement and for a time dominated Irish and British affairs. However, at the height of his power he was to be dethroned by the O'Shea divorce affair and died soon afterwards.