Scarcity. This results in hunger of all sorts. Which results in greed, war, and diminishing brotherly love.

Fear and how that manifests into greed, violence, jealousy, and oppression.

A deficiency or lack of mirror neurons. When people see other people as objects, they feel free to abuse them as they see fit.

Evil is a necessity required for the good to be noticed and appreciated as a contrary, for the good thrives by fighting the evil.

Creative energy driven by fear, greed, selfishness, and myopic, short-term thinking.