A civilized society's first line of defense is not the law, police and courts but customs, traditions and moral values. Behavioral norms, mostly transmitted by example, word of mouth and religious teachings, represent a body of wisdom distilled over the ages through experience and trial and error. They include important thou-shalt-nots such as shalt not murder, shalt not steal, shalt not lie and cheat, but they also include all those courtesies one might call ladylike and gentlemanly conduct. The failure to fully transmit values and traditions to subsequent generations represents one of the failings of the so-called greatest generation.
Behavior accepted as the norm today would have been seen as despicable yesteryear. There are television debt relief advertisements that promise to help debtors to pay back only half of what they owe. Foul language is spoken by children in front of and sometimes to teachers and other adults. When I was a youngster, it was unthinkable to use foul language to an adult; it would have meant a smack across the face. Back then, parents and teachers didn't have child-raising "experts" to tell them that "time out" is a means of discipline. Baby showers are held for unwed mothers. Yesteryear, such an acceptance of illegitimacy would have been unthinkable.
To see men sitting whilst a woman or elderly person was standing on a crowded bus or trolley car used to be unthinkable. It was common decency for a man to give up his seat. Today, in some cities there are ordinances requiring public conveyances to set aside seats posted "Senior Citizen Seating." Laws have replaced common decency. Years ago, a young lady who allowed a guy to have his hand in her rear pocket as they strolled down the street would have been seen as a slut. Children addressing adults by first names was unacceptable.