In the book "Brave New World", which is the group predestined to do menial work?

In Aldous Huxley's book, "Brave New World" (1932), a group that is predestined to do nothing but menial work is the Epsilons. Here, the Brave New World society is based on a caste system. There are five castes; they are Alphas, Betas, Gammas, Deltas, and Epsilons. The book is a dystopian novel set six hundred years in the future. The novel envisions a world that, in its quest for social stability and peace, has created a society devoid of emotion, love, beauty, and true relationships.

The Alphas and Betas are at the top of a five-tiered caste system. Only the Alphas and Betas come from single eggs; they are not budded and hence have no twins. The 'Centre', the Central London Hatchery and Conditioning Centre, conditions all the non-Alpha and Beta embryos for their future status within the society. It is the place that divides them into Gammas, Deltas, and Epsilons. So, the Alphas represent the intellectually superior group, followed by the Betas. The others continue down to the Epsilons, who have little to no intelligence and must perform almost all of the menial jobs and labor within the entire world society.