If there had been no Ancient Greek civilization we'd be behind in literature, art, technology, science and much more. The Greek gave the world new ideas and an individual right in self government. The world right now would probably be in the 1619 A.D not 2019 A.D.
The only difference between the two is the action in which it was done. They are still similar because you are physically hurting another individual.
It hides in clothing and furniture -a
Technically, yes, it is true that the development of the middle class signaled a decline in the importance of nobility, since people were able to have more economic freedom.