There's always been a fight between good and evil. But good and evil aren't necessarily good man versus evil man. This is a notion whose logical form can be traced back to the beginning of time. There is a universal struggle for life but within that struggle lies differing methodologies as to how survival can actually be attained.
Some methodologies aim for all life to benefit in the struggle for survival. There are also other methodologies that pursue blind selfish ends and seek to live whatever the cost of surrounding life. This is the evil. I think...
This is how a serial killer can envision murder as an art form. The act of surviving by killing. Anti-life has been given meaning and purpose. Something to be attained.
This is how a corporation can endeavor to live, live, live by accumulating the life force out of everything it comes across until there is nothing left outside of itself.
The good is what a surviving entity that possesses power experiences. The evil is what the disenfranchised, the vacant, the declining towards death experience...
And so on into infinity.