common courtesy

This world is losing its love.
What happened to fellow-feeling and kindness and common curtesy?

A simple example: holding the door for strangers.
I am a kind person who was raised right, so I always hold doors for people. It's a habit.
But I have to hold back my disappointment and anger sometimes because my kindness is rarely reciprocated. The exception is my college. Alot of people seem to hold doors for others at my college.
But the majority of people will let a door slam in your face (even if you are two feet behind them), or will not say "thank you" when you wait to hold the door for them.

It baffles me! Were people not raised to say "thank you" when someone shows a kindness like that to them? Or do we too easily forget how we were raised and take acts of kindness for granted?

Please make it your aim to say "Thank you" the next time someone holds the door for you- or holds a cab, or offers you a tissue, or even tells you that you dropped something- because that small token of appreciation could make or break a person's day.