What is theme of part 1 of gullivers travels

Throughout his journeys Gulliver comes into contact with several different races of people, all of which are narrow-minded in some way. Many of the peoples are conspicuously narrow-minded, such as the Lilliputians, who have wars over the correct way to cut open an egg. (Such squabbles over unimportant matters are a common object of satire.) Even the Houyhnhnms, who are so revered by Gulliver, cannot believe there are other reasonable ways of living.