"EVILLLLLLLL EEEEVILLLL" -Mermaid Man

(Question 1)
Its a mystifying phenomena when a decent person makes an unexpected transition to a darker side of thinking or acting. One can wonder how or why this could happen to a person previously viewed as a good-hearted individual. The root of evil intentions cannot be pinpointed to a specific cause, because it differs among individuals. Macbeth was a war hero, and beloved king, with all he needed, and nothing to really complain about. He was the definition of a good man. In Macbeth's case, the seed of evil was planted with the prophecy of the witches. "Hail Thane of Cawdor..." The idea blossomed and grew within Macbeth's heart and mind, it caused him great internal trouble as he become bombarded with the idea of murdering his cousin, his own blood, for what? Power. For one to make the transition, there has to be a reason. This is referred to as the "Lucifer Effect". "The Lucifer effect describes the point in time when an ordinary, normal person first crosses the boundary between good and evil to engage in an evil action. It represents a transformation of human character that is significant in its consequences. According to Christian legend, Lucifer was once God's favorite angel until he challenged God's authority and was cast into Hell with all the other fallen angels" (http://www.quora.com/What-is-the-Lucifer-Effect) IN other words, when a person commits a small evil act, it can have a exponentially downward cascading effect to the individual's ethical and moral values. Obviously the initial resulting mental effects of becoming evil are quite negative (unless you are a psychopath...)  as expressed by Macbeth, who was subject to paranoia, denial, kill-your-bestfriend syndrome, and proceed-to-decimate-an-entire-family disease. Now I am being comical with reference to Macbeth, however, in the real world, evil people one sees in mugshots, on tv screens, and in everyday life, could have very well been a good person prior to making their transition for their own case specific reason. It is important to resist evil temptations because you could be one act away from turning to an evil life. (that part kinda sounded a little religious, no offense to anyone, <3 u guys)