Cain is the first book of ethical dilogy by the founder of fate analysis Leopold Zondi. It reveals the fate-analytical point of view on the nature of evil in man. Evil is personified in the image of the biblical character Cain. The author points to the direct connection of evil with the genetically embedded paraxismal-epileptoid incentive predisposition to the accumulation of the affects of hatred, jealousy, envy and thirst for revenge in the soul of a person.