The Irish Citizen Army underwent a complete reorganisation in 1914. In March of that year, police attacked a demonstration of the Citizen Army and arrested Jack White, its commander. Seán O'Casey, the playwright, then suggested that the ICA needed a more formal organisation. He wrote a constitution, stating the Army's principles as follows: "the ownership of Ireland, moral and material, is vested of right in the people of Ireland" and to "sink all difference of birth property and creed under the common name of the Irish people".