Cain and Abel were the first children of Adam and Eve.
Cain said to his brother Abel, “Let us go out in the field.” When they were in the field, Cain attacked his brother Abel and killed him.
Then the LORD asked Cain, Where is your brother Abel? He answered, “I do not know. Am I my brother’s keeper?”
From the beginning of the revelation of God’s Word to man, this question has been central to our Faith, and to our identity as children of God, “Am I my brother’s keeper.