The first book to chart the political and ideological evolution of Irish government policy towards Northern Ireland from the partition of the country in 1921 to the present day. The book demonstrates how in its relations with the British Government, Dublin has been transformed from spurned supplicant to vital partner in determining Northern Ireland's future, a partnership jeopardised by Britain's decision to leave the European Union.

Includes bibliographical references (pages 297-312) and index.

Introduction : Parties and policy making in Ireland -- The politics of partition, 1920-1932 -- De Valera's Northern Ireland policy, 1932-1948 -- Failed campaigns, 1948-1969 -- War, 1969-1974 -- In fear of Armageddon, 1974-1979 -- Totality of relationships, 1980-1992 -- The age of consent, 1992-2018 -- Conclusion -- Appendix 1 : A century of government in Ireland, 1919-2018 -- Appendix 2 : Key personalities.