Manners have always been a part of American culture. George Washington, our first president felt if a country had no manners it would go into decline. From the beginning of America , people were taught to be polite and know the difference between right and wrong.
It seems that in today’s world we need to bring back manners and not think of ourselves first but others. Start by being polite. Use the words please and thank you. For example hold the door open for someone or just put a smile on your face. It will make a difference and other will follow by you example.