Courtesy smooths relations between heads of state, competing athletes, family members, opposing military commanders, and between servers and the served. In dialogue, courtesy displaces rudeness, hostility, and aggressiveness, thus lowering stress and tension between parties. Courtesy has evolved from socially prescribed expectations within notions of upper-class gentility. While civility is respectful consideration in everyday social interaction, courtesy is a more formal, genteel social protocol.
Your sincere regard and deep respect of others is conveyed through your courtesy—your polite behavior and good manners.