Conditioning is relative to culture. I grew up in the South. I say hello to my neighbors when they are sitting outside on their porch. I offer people something to drink when they come into my home. You probably won' t find that in New York City or most parts of New England.
People are generally more rude and crass, especially with strangers.
I'm not sure if I can answer that question objectively. I enjoy the fact that I can walk down the street and not feel silly about greeting my passers-by. But I don't hold the door for someone with spite in my heart. Our behavior also comes from our upbringing. My parents were very intent on our using manners and being respectful and considerate children.