Edward A. Magan describes O'Grady as "at once a political polemicist, a creative writer, and a somewhat unusual historian," involved in all three roles in this Utopian treatise which "reveals the pervasive influence of classical scholarship upon the Irish intellectual life of the period." O'Grady argues for drastic change in Ireland in the first part and in the second makes extensive use of classical Greece as a model for Ireland. Some parts of it were published as journal articles in his lifetime, but most are published here for the first time.
His father was the Reverend Thomas O'Grady, the scholarly Church of Ireland minister of Castletown Berehaven, County Cork, and his mother Susanna Doe (or Dowe). Standish O'Grady's childhood home - the Glebe - lies a mile west of Castletownbere near a famine mass grave and ruined Roman Catholic chapel. He was a cousin of Standish Hayes O'Grady, another noted figure in Celtic literature, and of Standish O'Grady, 1st Viscount Guillamore.
He married Margaret Fisher and had three sons. Advised to move away from Ireland for the sake of his health, he passed his later years living with his eldest son, a clergyman in England, and died on the Isle of Wight.
His eldest son, Hugh Art O'Grady, was for a time editor of the Cork Free Press before he enlisted in the Great War early in 1915. He became better known as Dr Hugh O'Grady, later Professor of the Transvaal University College, Pretoria (later the University of Pretoria), who wrote the biography of his father in 1929.
After a rather severe education at Tipperary Grammar School, Standish James O'Grady followed his father to Trinity College, Dublin, where he won several prize medals and distinguished himself in several sports.