How the courtesy, manner & politeness contribute in success?

Question

How the courtesy, manner & politeness contribute in success and other way around how rudeness and discourtesy lead to failure?

Answer 1

when you show manners, politeness, and courtesy people are more relaxed. It makes someone feel good toward you when you show them kindness. But when you are rude and discourtesy people will get mad and this make them think that you are a jerk. With this one they will not trust you, and trust goes a long way in this world.

Answer 2

when you take courtesy, manner and politeness into consideration you can communicate better. and once you communicate better you receive more attention and it will bring you to success