Until and unless there is other life found in the cosmos, the issue of good and evil seem to be manifest only in mankind. The rest of what happens in the universe simply is, it is not either good or evil.
A dingo is not evil for attacking its prey, nor is the the universe inherently evil because it exists.
It seems that only man can develop a spark of evil that leads to genocides, murders, subterfuge and more.
So do you think that there is a universal battle for man to make him one or the other? Or is it purely a environmental circumstance that leads some to this path?
Not to sound trite but I believe it is a combination of the two. I believe that man create with the ability to do either good or evil. Now it is a matter of environment and personal choice. But when it is all said and done...everyone makes their own choice, regardless of what may have served as an influence.