It never happens all of the sudden.

Bullying.
We see many incidents reported on TV, newspaper, or in the internet.
Those incidents are only the result.
What about the start?

It never happens all of the sudden.

Every rivers started as a stream in the mountain to be ended in the sea.

Little unkindness gained its fresh and blood and changed its name as "violence", because the action takers gained more muscle and bones.  The physical growth of the action takers make little ill intention more tangible.

What if we could have "reformed" that unkindness to be "kindness" while it is little.

Every violence of young age people, has started as unkindness in the younger age, as children.

It all depends on how we, parents react, on the spot where it started.