Human religion denotes any system of related beliefs held by a human about one or more deities, habitually involving codes of ethics. While many such belief organizations advanced naturally, others were swayed by extra-terrestrial impacts over time. Despite the establishment of many religions on Earth during recorded history, no one religion dominated the whole human culture.
In the 23rd century, a few Federation starships had a nondenominational chapel
where ceremonies could be held. Both mono- and polytheistic beliefs and traditions occurred in the 23rd century. Lara, a future human, utilized the phrase, “In the name of the seven Gods!” Kirk had replied to that, “Mankind has no need for gods. We find the One very sufficient.”
Some commented on the fate of certain religions in Trek history: “Gene felt real strong that all our modern-day Earth religions would be departed by the 23rd century. While a couple of us around here really share that opinion, we feel that we must leave this part of the Trek universe alone.”
Some said that “In Gene’s imagining of the future, religion is totally gone. Not one human believes in any of the beliefs that has afflicted our civilization for years. This was an imperative part of Roddenberry’s mythology. Gene was a nonspiritual humanist and made it known to writers of Star Trek and future Star Trek series that superstition, mystical thinking, and religion are not to be in his universe.
Still, the series has never authoritatively stated that religion is completely dead among humans or that any religion has died out. It seems it has taken a back seat to scientific belief. For instance, Kirk seems to proclaim himself as monotheist by stating the phrase that was mentioned earlier: “Mankind has no place for gods. We find the One to be quite sufficient.