Our reaction programs are precious assets. Like little pets we like to have around, we must feed them and care for them. Such programs feed best on information and reaction from outside ourselves, the wider the experience the better the food source.
To continue to have a healthy set of good programs, we need open communication.
One of the main ways evil propogates is to take away people's access to reaction and information, a person's ability to communicate yes/no feelings and opinions and reactions to one's own. That way, the path towards a quality of life is skewed because the concept of quality of life is directioned at a variance from the ideal direction that is best and inclusive to all.
Food, warmth, security.
If the body has basic needs, then it will be less receptive or even hostile to changing behavior patterns. IT will have no energy to spare.
Another main way evil propogates is to take away people's ability to feed, clothe, and protect themselves. We see this multiple places around the world: we call it "abuse of human rights". Moscow vilifying the Chechnian ethnic people after removing their ability to care for themselves. Israel doing the same to Palestinians. Darfur. SW Asia. Tibet. Just the main examples of today. Like fungus. Make things dark and damp, and you start a disease that you will eventually have to fight again.
Born good. Gradually go bad and be okay with that. Be bad and be not quite ok. Do bad things, realizing that, without knowing why, and being bothered by it all. Gradually relearning better behaviors. Being good again.
As a gardener, I'm reminded of the rule of best fighting against plant pests and diseases: Give each plant its optimum environment and it will fight against its predators more effectively, and win. Meet its basic needs, and you will have a healthy and beautiful plant.
Of course, if there's not enough to go around...
It is the nature and the intelligence of evil to make it feel "good" to foster lacks and mechanisms that ensure future lacks so that the evil-oriented programs grow and propogate until entire cultures of people and organisms eventually die (or experience lowered quality of life), but not before infecting others. Evil propogates itself, or tries to.
Evil meets the definition of a living thing. It feeds. It changes its intake into its own form. It reproduces. It protects and propogates its own. It tries to extend its influence and power, creating its own energies. The forces of evil expand and coalesce, and consume the assets of good. Evil feeds on good. It needs good to exist. Once enough surrounding good has been corrupted sufficiently - broken down/fragmented, only then that particular evil itself withers. Like a cancer, it dies with the people it consumed. However, because an evil intelligence usually transcends over more than one person or people, the whole evil organism can simply cleanse itself and adapt and grow by mutation.
Although we see good and evil as two equal opposites, implying the one balances the other — the scale held up by the dame of justice — good and evil are not really quite the same types of fruit:
So the two, good and evil, are not equivalent opposites. Therefore the directions we implement (see Directions under Philosophy 1) must understand that to "do not do bad" does not mean "do good" and "do not do good" does not mean "do bad". Any direction, to be complete, must therefore be a two-edged sword, with one side being the "do not do bad" and the other "do good".