BIG QUESTION

Do we help others for the sake of helping others, or do we simply do it to say we did it? To clarify, I look around at a humanitarian community service project and see all of the other volunteers seemingly fake their smiles and get through the day. I've always asked myself, do they really enjoy helping others or do they simply wish to add "save the world" to their resume to achieve a sense of higher merit? I guess my question could expand onto something more vague, like are people born good (even though I do believe they are)? Has society shaped the students of America to become so competitive with one another that their values for other human beings almost vanish?