What could possibly go wrong?
That's how it happens.
One person at a time, doing what they can, where and when they can.
Saving one at a time.
The deformed son who is rejected by powerful father, mistreated, and must find his own way, goes rogue and does nasty things to hurt others because he is a deformed goblin and is resentful of everyone who isn't etc.
Bitter cripple is not a good person.