"Evil really only exists because good people do nothing", teachings from Emperor Halie Selassie I (aka Rastafari).

We all have seen what our fellow humans are capable of doing, Evil is all around us.
But it is the ignorance of those who do wrong, and the ignorance of those who educated them that opens a path for evil to get in their hearts.
We are all human, so we are all subject to ignorance, hell, I don�t know about most of the things I talk about, so we are all ignorant in some level or another.

I also don´t think Enlightment is about one person reaching Nirvana.
You won t be able to reach Nirvana if your purpose is to stop your own suffering, that is not possible.
The path to enlightment is a path of suffering, because as you become more and more enlightened, you become more and more aware of the Evil that is around us; and the little one can do to stop it.

I believe that if you are enlightened, in this physical realm you suffer even more than a non-enlightened person, you can reach Nirvana in this life, but Enlightened people choose the path of suffering for the well being of others.

Take Jesus for example, he was one of the most powerful enlightened human beings that have encarnated in this world ever, and he did not choose retirement in this life, he chose the path of suffering in this realm, the path of helping others.

Basically, I believe enlightened beings reach Nirvana after death, and they can continue in Nirvana forever if they want to; but they chose not to.
I mean, like all the enlightened people that the world have seen, they sacrifice their eternal happines in Nirvana to encarnate in this wretched world, to help other people to reach it; that otherwise wouldn t be able to do so.

Someone may say:
"For all the gurus, buddhas and swamis and so on who have given everything up and lossed there attachments to all things wordly".
To be enlightened, you don t need to give all those things up, what you need to give up is your own ego, which is very difficult for us normal folks.

The clearest example, is how in the Bible, Satan was the most beautiful angel, but because of his pride, his own Ego, he refused to obey the Lord.

Every man have the ability to do good (towards others) or to do wrong (Egocentric reasons); this lower nature in man is symbolized as Satan -- the evil ego within us, not an evil personality outside.