Council could not dismiss a fellow minister on his own authority. Instead, the Executive Council had to be disbanded and reformed entirely to remove a member. The President of the Executive Council also did not have the right to advise the Governor-General to dissolve Dáil Éireann on his own authority, that power belonging collectively to the Executive Council. In contrast, the Taoiseach created in 1937 possesses a much more powerful role. The holder of the position can both advise the President to dismiss ministers and dissolve Parliament on his own authority—advice that the President is almost always required to follow by convention. His role is greatly enhanced because under the Constitution, he is both and chief executive. In most other parliamentary democracies, the head of state is at least the nominal chief executive, while being bound by convention to act on the advice of the cabinet. In Ireland, however, executive power is explicitly vested in the Government, of which the Taoiseach is the leader. Since the Taoiseach is the head of government, and may remove ministers at will, many of the powers specified, in law or the constitution, to be exercised by the government as a collective body, are in reality at the will of the Taoiseach. The Government almost always backs the Taoiseach in major decisions, and in many cases often merely formalises that decision at a subsequent meeting after it has already been announced. Nevertheless, the need for collective decision making on paper acts as a safeguard against an unwise decision made by the Taoiseach. Generally, where there have been multi-party or coalition governments, the Taoiseach has been the leader of the largest party in the coalition. One exception to this was John A. Costello, who was not leader of his party, but an agreed choice to head the government, because the other parties refused to accept then Fine Gael leader Richard Mulcahy as Taoiseach. In 2011 Taoiseach Brian Cowen, resigned as party leader and was succeeded by Micheál Martin, but continued as Taoiseach until the formation of a new government following a general election. List of office holders Before the enactment of the 1937 Constitution, the head of government was the President of the Executive Council. This office was first held by W. T. Cosgrave of Cumann na nGaedheal from 1922 to 1932, and then by Éamon de Valera of Fianna Fáil from 1932 to 1937. By