An organization named IITTI was formed to test employee etiquette in interviewees.
Emily Post was a famous author who wrote a best-selling book called "Etiquette in Society, in Business, in Politics, and at Home."
Politeness, certain artistic standards, and behaviors started becoming markers of affluence and upward mobility.
The Chinese teacher, philosopher, and politician fostered a mindset that shaped morality, correctness in relationships, and justice.
The ancient Egyptian Vizier Ptahhotep wrote a book of Maxims that discussed how to treat others and exhibit self-control.