What event marked the origin of sin?

The disobedience of Adam and Eve is recognized as the event that marked the origin of sin in many theological interpretations. According to biblical accounts, particularly in the Book of Genesis, Adam and Eve were placed in the Garden of Eden with the command not to eat from the tree of the knowledge of good and evil. Their decision to disregard this command represents a fundamental turning away from God's instruction, which is viewed as the first act of sin.

This act of disobedience not only introduced sin into the human experience but also brought about a change in the relationship between humanity and God, leading to the concept of original sin. It underscores the theme of free will—a crucial aspect of many religious teachings—demonstrating that human beings have the choice to obey or disobey divine commandments.

While the fall of Lucifer is significant in discussing the origin of evil, it is the actions of humanity—represented by Adam and Eve—that fundamentally altered the nature of the human condition and introduced sin into the world. Other choices, such as the rebellion of Cain and the construction of the Tower of Babel, reflect instances of sin or disobedience but do not encapsulate the origin of sin itself.