This document provides a summary of Jonathan Swift's novel "Gulliver's Travels" and analyzes what Swift was trying to explain by having the protagonist Gulliver visit four different societies. It notes that Gulliver belongs to a middle-class English family and his voyages include visiting the lands of Lilliput, Brobdingnag, Laputa, and the Houyhnhnms. The document analyzes key differences and observations about each society, and concludes that through these four voyages, Swift highlighted differences in things like education, size, politics, and tendencies to satirize human folly and aspects of English society.