Humans determine what is good on a case-by-case basis. So long as we are trying to be good and trying to be thoughtful then there's hope for us. When we don't try we don't usually go as far as 'evil', but selfishness, greed and even rudeness are by-products of not trying (in my opinion).
The fact that a believer is happier than a skeptic is no more to the point than that a drunken man is happier than a sober one. ~ George Bernard Shaw