Final answer:
In 'Gulliver's Travels,' humans in the land of the talking horses were known as Yahoos, contrasting with the cultured Houyhnhnms and satirizing human society's shortcomings.
Step-by-step explanation:
The humans in the land of the talking horses in Gulliver's Travels were called Yahoos. These creatures were portrayed as uncivilized and barbaric, which was a sharp contrast to the intelligent and cultured horses, known as Houyhnhnms. The depiction of Yahoos reflected Jonathan Swift's satirical take on human nature and society's flaws.