Religion

Some part of chaos is seeking to destroy the order that was built.

In the Bible, it says the original evil came from Lucifer who was the most beautiful angel and was basically jealous of the competition for God's love that the human's presented.

I personally think the "Tree of Knowledge of Good and Evil" and the "Tree of Life" were not planted by God at all, but by Lucifer putting a bit of a bite into "free choice". There is some evidence that biologically we had some sort of membrane connecting the right and left halves of our brains. I think that whatever happened affected that and we think in "black and white" or "intuitively" but not both at once any more.

Like a bad drug once our thoughts were messed up we had to leave the garden because before that, we had power to make things happen. Tree of Life would have probably been some sort of zombie state inducing drug/fruit that would have left us forever "broken" mentally.

In order for free thinking humans to evolve back to that higher state we are living in this world making choices and seeing the results. When a person stays tuned into "Love others as you love yourself," as a guideline decisions are made without the evil intent. It is predicated on the idea that you do care about yourself as a basis.