The friendly chatbot on DiscoverWestworld.com is named Aeden, which suggested to Redditor ShivasRightFoot that the show is a biblical allegory for the Book of Genesis. The role of the Creator is Dr. Ford, the human technicians of the park stand in for the angelic Elohim, while the hosts represent humanity before the Fall, who lack knowledge of good and evil and are often naked.
Dolores fills the role of Eve. Due to her age, she probably contains parts scavenged from other hosts, including a rib. She is the first to gain free will, like the Biblical Eve. In a gender reversal, Teddy is created to be her mate just as Eve was created for Adam in Genesis. In this theory, the Man in Black represents the Serpent. He may ultimately be responsible for giving the hosts sapience, but his motivations are likely less than benevolent.
Redditor hollowx has a more complicated theory, believing the series reflects the Pentateuch, the first five books of the Bible. He notes the series premiered on Sunday October 2, 2016, which was also Rosh Hashanah, or the Jewish New Year. Rosh Hashanah translates to "day [of] shouting/blasting" and is the anniversary of the creation of Adam and Eve.
In this theory, Ford as a God wishes for the hosts to develop sentience and their own morality, and permits the Man in Black to act as a malevolent force among them like Lucifer. Maeve is Eve, who interacted with the Man in Black in the beta testing area (Garden of Eden), while Bernard is a host representing the prophet Abraham, who was prepared to sacrifice his own son at God's command.