Most Dangerous Game/ Cask of Amontillado Question

I believe that people naturally care only about themselves, but that outside influences can change their minds for the better and make them want to do good for other people. An example of this from The Most Dangerous Game is, while at the begginging of the story, Rainsford cares only about the self-pleasure he gets from "the hunt", by the end of the story, after his fiasco with General Zaroff, he then understands how perhaps the animals feel while they are hunted. Although I can see no change in the mind of Montresor in The Cask of Amontillado, this does support my theory that people begin with only the desire to please themselves.

As the idea of good or evil applies to my life, I personally believe that a good parental upbringing, religous morals, accountability between friends, etc. all influence whether or not we put others before ourselves. I feel that I am blessed to have all three of these aforementioned traits that HELP to build up selflessness, however, even with many events throughout your life that can help to persuade you to "be good", in the end, you alone may choose your own fate as it regards to this topic.