Well I would think that evil was a bi product of humans, as in to create something (or indeed anything) it cannot be perfect as it is not God therefore God decided that rather than sit around all day thinking that he could not create anything he created a solution. Why not give people a choice? Not a choice of do bad, no we are all bad but a choice of either be an average human or try to be good and then get Christ to forgive you. In answer to the question, everyone is evil and if God where to just pick everyone 1 good person he came across that would be a) stupid because the whole point is that you give people a choice not just just create the good ones as then the good would become bad. Point A is a bit like Adam and Eve that their command was simple, it was not do not kill or do not steal... it was do not eat a fruit just one. Yet the "good" Adam and Eve did it anyway and were kicked out of the garden, this recount shows humans to be disobedient and will do the wrong thing every time. b) So therefore point A sort of shows there to be no good person only a person who is forgiven because they do what God wants.
Parva leves capuint animas but then again crazy stuff is so tempting