Our task was to read the Enuma Elish and answer the following questions:

Question

Where does evil come from in this myth, and how is it symbolized?
Is the defeat of evil final and total? Does evil have any good qualities?

Answer 1

Here are some sites which may help you answer these questions

http://en.wikipedia.org/wiki/En%C3%BBma_Elish

http://www.sacred-texts.com/ane/stc/index.htm

To answer the second question, Can the defeat of evil ever be total... I suspect that reviewing history will give you the best answer to that.... To be concise... Humanity will be human.
MY opinion solely... sometimes when people see an evil act, they respond in a "good" way to counteract that evil.