Part IV
Characters
Lemuel Gulliver: the main character and narrator of the novel, a ship's surgeon
Gulliver's family and friends: the people who Gulliver returns to in England after his travels
The Houyhnhnms: intelligent horses on the land of the Houyhnhnms who are governed by rational rules
Themes
Human nature: Gulliver's experiences on the land of the Houyhnhnms highlight the complexities of human behavior and the influence of social and cultural factors on personal actions and beliefs, and his struggles to adjust to life among humans reflect the challenges of living up to the ideals of reason and virtue
Society and culture: Gulliver's reflections on his travels provide insight into different cultural values and beliefs about aging, death, and social status, and his criticism of human behavior and values reflects his own sense of disillusionment and disappointment
Power and authority: Gulliver's experiences on the land of the Houyhnhnms and his interactions with the small people and the giant people highlight the dangers of corruption and abuse of power, and the importance of responsibility and accountability in leadership
Language and communication: Gulliver's writing of his accounts of his travels reflects the importance of language and communication in understanding and sharing experiences and perspectives.
Summary
Gulliver returns to England and is initially unable to adjust to life among humans due to his experiences on the land of the Houyhnhnms
Gulliver isolates himself from his family and spends most of his time in his stable, where he reflects on the lessons he has learned from his travels
Gulliver begins to write his accounts of his travels and shares them with his family and friends
Gulliver eventually becomes more comfortable among humans and is able to engage in society again, but remains critical of their behavior and values