How about this? Just 30 or 40 years ago it was basically accepted that a man could slap a child or his wife to keep them in line. Today this is now considered corporal punishment (for the child) and is banned by most states in Australia and the other is considered domestic violence and also against the law.
I can see the day in maybe 30 or 40 years time that displaying anger will be considered unacceptable also. Not against the law just simply seen as understandable because we make mistakes but still a mistake and therefore unacceptable, just like our violence is being tamed.
For me, today, anger is seen as understandable but not acceptable. I guess I am 40 years ahead of my time as I have not met anyone that believes this yet. If anyone agrees that anger is understandable but not acceptable like this or respond.
I have a feeling it is too early yet.