One theme of this novel is “Might Versus Right”. Gulliver's Travels implicitly poses the question of whether physical power or moral righteousness should be the governing factor in social life. Gulliver experiences the advantages of physical might both as one who has it, as a giant in Lilliput where he can defeat the Blefuscudian navy by virtue of his immense size, and as one who does not have it, as a miniature visitor to Brobdingnag where he is harassed by the hugeness of everything from insects to household pets. His first encounter with another society is one of entrapment, when he is physically tied down by the Lilliputians; later, in Brobdingnag, he is enslaved by a farmer. He also observes physical force used against others, as with the Houyhnhnms' chaining up of the Yahoos.

Another theme is “The Individual Versus Society”. Gulliver's Travels could in fact be described as one of the first novels of modern alienation, focusing on an individual's repeated failures to integrate into societies to which he does not belong. England itself is not much of a homeland for Gulliver, and, with his surgeon's business unprofitable and his father's estate insufficient to support him, he may be right to feel alienated from it. He never speaks fondly or nostalgically about England, and every time he returns home, he is quick to leave again. Gulliver never complains explicitly about feeling lonely, but the embittered and antisocial misanthrope we see at the end of the novel is clearly a profoundly isolated individual.