you've established you want to eradicate evil, however the question which arises is "who is evil and good" and "who decides it". Good and evil are black and white, how do we decide that in a greyish world like ours. Some government officials may seem evil, but if you look deeper they could be good.
Definitions. Describing reality and the actions in reality and the harm those actions do, is what defines good and evil. It principled thinking, non-contradiction and vision to see what is happening. There are degrees and grades of good and evil, not absolutes like black or white. No One is 'Pure' Evil
I do agree with you, but I believe evil is not something that will be eradicated due to the reason there exists balance. Sometimes there is too much evil, other times there is too much good. This universe is all about balance of these two poles.