The curse of Cain originates from Genesis 4 in the Bible, when God punished Cain for murdering his brother Abel. It condemned Cain to a life as a wandering fugitive, stripping the land of its ability to grow crops for him. God also placed a protective mark on Cain to prevent others from killing him in vengeance. 

Biblical Details & Interpretations

• The Offense: God rejected Cain’s agricultural offering but accepted his brother Abel’s livestock offering. Consumed by jealousy, Cain killed Abel. 
• The Punishment: God exiled Cain from his home and declared the ground would no longer yield produce for him. This forced him to become a wanderer in the land of Nod. 
• The Mark of Protection: Terrified that he would be killed for his crime, Cain was given a sign by God. The exact nature of the mark (the Hebrew word is ‘owth) is unspecified, but it served as a divine warning that anyone who harmed Cain would suffer a seven-fold vengeance. 

Cultural Impact

• Racist Misinterpretations: In previous centuries, a deeply misguided and unbiblical interpretation falsely linked the “mark of Cain” to dark skin. This harmful notion was historically used by some to justify racial discrimination and the African slave trade, and has also appeared in other cultural contexts like historical doctrines of the LDS church. 
• Literary & Modern Usage: The theme of an outcast bearing an unforgivable mark has permeated literature, philosophy, and media. Thinkers like Regina M. Schwartz have explored this narrative as a symbol of exclusionary, violent collective identities. Pop culture references include it in television series like Supernatural and Lucifer.