Satirical novel by the Irish writer Jonathan Swift published 1726. The four countries visited by the narrator Gulliver ridicule different aspects of human nature, customs, and politics. Gulliver's travels take him to Lilliput, whose inhabitants are only 15 cm/6 in tall; Brobdignag, where they are gigantic; Laputa, run by mad scientists; and the land of the Houyhnhnms, horses who embody reason and virtue, while the human Yahoos have only the worst human qualities.