Edmund John Millington Synge (/sɪŋ/; 16 April 1871 – 24 March 1909), popularly known as J. M. Synge, was an Irish playwright, poet, writer, and collector of folklores. As a key figure of the Irish Literary Revival during the early 20th century, he is widely regarded by critics and scholars as one of the most influential dramatists of the Edwardian era, and by several of his peers, among them William Butler Yeats, as the most prolific playwright in Irish literature.
His play The Playboy of the Western World (1907), one of his best-known works, was initially poorly received, due to its bleak ending, crude depiction of poor Irish peasants, and the idealisation of patricide, leading to hostile audience reactions and street riots in Dublin during its opening run at the Abbey Theatre, which he had co-founded with W. B. Yeats and Lady Gregory. His other major works include In the Shadow of the Glen (1903), Riders to the Sea (1904), The Well of the Saints (1905), and The Tinker's Wedding (1909). Most of his plays were known for their highly realistic depiction of Irish societies and culture, and included plots, themes, landscapes, and settings from places he visited during his travels.