 The PD benefited from the break-up of the Socialist-Liberal alliance after the death of Paul Eyschen, and soon became the dominant party, strengthened by the introduction of universal suffrage in 1918.The leader of the Party of the Right would serve as the Prime Minister from the end of the First World War until the start of the Second, except for a fourteen-month period in the mid-1920s.The three Prime Ministers from the Party of the Right were Émile Reuter (1918-1925), Joseph Bech (1926-1937), and Pierre Dupong (1937-1944); the latter two would go on to serve as Prime Minister as heads of the CSV.