It does seem to be true that parents find teachers have lost the authority they used to have, especially in the eyes of teenagers. They are no longer seen as models for behavior: hard work, politeness and other positive qualities are seen as old fashioned. Many young people have no respect for these qualities or the people who represent them. In fact, I think when young people today are so rebellious that it’s possible that both parents and teachers are afraid to exercise their authority. However, I do not agree that this is the basic reason for the increase in teenage violence.
While I believe it is true that a lack of social and emotional learning contributes to the problem. Other factors are surely involved: economic factors, for example. If a child comes from a poor family and they live in low-quality housing in all undesirable area, this is sure to affect the child, however loving the parents are.
There is also the question of who your friends are. I believe that when you are in your teens your friends have more influence on you than your parents or teachers. At that age, you want to be part of a group, or even a gang, and this might lead to breaking the law in a number of ways.
In conclusion, while I agree that lack of social and emotional learning from parents and teachers is a factor in the growth of teenage violence, I do not believe that it is the only or main cause.