Risk for a reason

I believe that in most cases if a disaster is to occur people wouldn't risk their own lives to saving a stranger. It just not logical to give up your own life for someone you have never met before. However there are people that are at the two extremes. There is a type who would risk anything and everything to save another human being's life, and the other would to anything just to save him/herself. The majority would still be in the middle, these people would hesitate and take the risk into consideration. They may end up thinking that risks aren't that large and go for it and sometimes the risk is too much to be taken and they bail out. There are more stories about people being brave and risking their own life for saving another's. I believe that some save other because they see a the importance of the person surviving, or they may just be every open hearted. Yet some people are either too scared risks or jut to selfish to save another person. To me if the person trapped was the one who caused the disaster it still wouldn't change my choice of trying to help him/her out of the situation, because they could be punished afterwards. Not unless my closest friends or family dies because of him/her I would leave him/her there to die. On the other hand in natural disasters things would be different I would try to help as much people as I can, because there is no one to blame for the casualties, and the more that survive the better.