Love the idea and it is very plausible Forest..
The ability to reshape reality, with an independent will, not of/with the will of the Creator resident, that leads to a lie(s), then in turn, generates an amount of evil (spirit), and this type(s) of energy then permeates into the world. And as the population of human beings increase, each with independent wills (not in God's will), the more wills are present to recreate or reshape reality, then more varieties of lies and the more evil, and these different types build in this world over time. (one of which John spoke of, the lie that Jesus never was physically a human being on earth at one point (spirit of opposition to Christ). This is just one type of spirit of evil generated)
So eventhough it sounds simplistic, this process initiated by Forest, yourself, and then outlined further here, can be a complicated although it's logical and a biblically-backed process to capture on paper (and it excites me to provide equations for this entire process) and its progression.
We can see why with each new generation born, more types of evil of different spirits are generated, and therefore more volume, (like sucking the air out of the atmosphere) and therefore it is a compounding action, of increasing intensity into this world. It becomes a self-sustaining and increasing collection of spirits of evil as one cumulative storm of evil spirits, formed from many small ones.
So the trigger for evil was the creation of an evil being in heaven first, and then it enticed the 1st Adam/and his wife who was/were allowed by design, to live with an independent will, away from God, independent of his own Spirit. And to boot, he had a wife of the same type of vessel, and both enjoyed the pleasures that the 5 senses brought him and her, to imagine and reshape reality..to lie(s)..to evil.
Then the 2nd Adam, although with the same human and independent will, also possessed the will of his Father resident within him. And he chose to leave his own will 'behind' and do his Father's will.....to arrest evil eventually and permanently, and destroy it, along with its cause, sin that produces 'death'...
Later...generating a set of equations on this tide of evil in the world ....soon...