@philosopherqueen,
i think this idea of good/evil comes out of the organization of society in history.
1st Time this idea was introduced in metapyshics( which in turn lead to politics) which did control an area was PERSIA(an empire) then as time went on other sofisticated empires used
but when the question comes from the social connotations we have about each, it is based on some of the historical things that we have defined internationally, national, and individually on actions that each have.
in the western world evil internationally IS defined as nazism, religious fundamentalism, ect... ( with that you can figure out the other many perspectives {individual/ societal})
but this evil and good can be seen on each prespecitve on how we view these things in those three perspectives as self interest
what does not benefit me can ultimately become evil vice versa