Much has been written about the Troubles in Northern Ireland in the 50 years since the conflict began.
Dr Brian Hanley has now written The Impact of the Troubles on the Republic of Ireland, 1968-79, a rare examination of the effect the Troubles had in the south.
He feels that this "profound" effect has often gone unrecognised, along with the wave of emotional solidarity many had with northern nationalists.
He joined us on The Last Word to discuss this story.
Listen to the interview in full by pressing the play button on this page.
