Cain (theology)

Cain was the brother of Abel and had a rivalry with his sibling fuelled by jealousy that quickly turned to rage - his rage would then turn to sin as Cain killed his brother in a mix of anger and jealousy: according the Biblical teachings this was the first true murder mankind committed and as such Cain has become an immortal symbol of villainy in religious works and is referred to often as "the first murderer".

Cain's actions lead humanity further into darkness and in some texts Cain is seen as a son of the Serpent (aka Satan) - even when seen as an ordinary man rather than a demonic figure Cain is portrayed as corrupt and cruel - in some ways reflecting the darker aspects of humanity.

Cain is a popular figure in fiction: often repeating the murder of his brother in many different settings - a famous example of Cain in fiction is the character in DC comics: who is portrayed as immortal and doomed to endlessly murder Abel over and over for all of time.