As always, great article, coach Ripp.
This year in college, in anatomy and physiology we've learned that there are four main things that determine the stability of a given joint: bone shape, ligament length and extensibility (passive stabilization, as these cannot be influenced by training), muscle tone and the muscle mass around a joint (these two provide active stabilization, since we can influence these through training).
Nevertheless, right after saying this, the teacher said ''that's why stability training is so important''...