According to the literal description, Cain was the first, eldest son of Adam and Eve.

"Cain" is a characteristic of every person who lives by "cultivating the earth," i.e., serves only material interests and concerns, strives to acquire, to accumulate "earthly" values.   

      The names of both brothers, Cain and Abel, reveal the spiritual characteristics of the two types of people, the essence of their way of thinking and living.