Synge's most famous play, "The Playboy of the Western World", "caused outrage and riots when it was first performed" in Dublin in 1907. O'Casey was a committed socialist and the first Irish playwright of note to write about the Dublin working classes. O'Casey's first accepted play, "The Shadow of a Gunman", which is set during the Irish War of Independence, was performed at the Abbey Theatre in 1923. It was followed by "Juno and the Paycock" (1924) and "The Plough and the Stars" (1926). The former deals with the effect of the Irish Civil War on the working class poor of the city, while the latter is set in Dublin in 1916 around the Easter Rising.