The Houyhnhm society is based on a utopian society where everything is run perfectly. It seems communist in the way that everyone has his or her own job and hierarchy in the society. For example, each Houyhnhm is born into a distinct class and stays there during his or her lifetime, no matter what kind of work they do. There seems to be a common sense of acceptance within the Houyhnhm society because each horse knows what it is supposed to do (regardless of class) and performs their tasks without complaint. The Houyhnhms are much disciplined, which makes the community an ideal place to live because everything runs the way it is supposed to. In fact, Gulliver believes this society to be perfect and wants to continue to live this way.
As perfect as their society seems to be, the Houyhnhms lack several human qualities. For example, they lack emotion and sympathy. They also do not have a concept of passion; for instance, the Houyhnhm women seem to be asexual, as opposed to humans. There also is no love in the community. For example, the relationships between parent and child seem clinical and unnatural. The women reproduce because that is their role in society. Another human quality the Houyhnhms lack is that they take everything at face value and have no concept of lies. There is not even a word for lie; it is just referred to as “the thing that is not,” which Gulliver has a hard time understanding. They also lack the ability to write, so traditions and stories get passed down orally through generations instead of being recorded into books, which could cause problems in the future.
If humans abandoned emotions to live as purely rational beings, there would be both positive and negative consequences. I think humans would gain more discipline in work and become more of a close-knit society, where everything would be done for the greater good of society instead of for personal gain. However, there would be losses as well. No one would be accepting of other cultures and races; instead they would shun others who are different. Gulliver finds this out when the Houyhnhms make him leave because he is too much like a Yahoo to help their society prosper. Also, emotions and the ability to reason are qualities that set humans apart from all other animals. For example, humans are the only species who reproduce and form bonds with their children. If humans were purely rational, I do not believe that they would be able to function as individuals, and much less as a community. If all of these qualities were lost, humans would not be any different from other animalistic societies and therefore would not continually thrive as a whole.