This post comes from the following question: “What do mormans [sic] believe about original sin?”
This question is most simply answered by a statement Joseph Smith gave about our beliefs: “We believe that men will be punished for their own sins, and not for Adam’s transgression.” (AoF 1:2)
We also believe that “every spirit of man was innocent in the beginning” (D&C 93:38). Additionally, men are “free to choose liberty and eternal life, through the great Mediator of all men, or to choose captivity and death, according to the captivity and power of the devil” (2 Ne 2:27). In short, this means that we are not inherently evil because of an “original sin”. Rather, we are created innocent with the freedom to choose good or evil and are accountable for only the choices we make and not for the choices Adam made.
That being said, the fall of Adam did introduce the possibilities of sin and death to his posterity (i.e. us). Thus, while not being directly accountable to God for a decision we never made, Adam’s transgression does nonetheless affect us (Alma 42:5–9, 14).
For more information, see the following: