Answer:
I think what makes it unique is that it's alternative, altruism, is often debated to be near impossible. There are those who claim egoism is human nature and those who think that people are capable of any form of thought, thus allowing one to be truly altruistic. Many think that even when one is consciously doing something for others, they are subconsciously acting in self-interest.
Explanation:
hope this helps :)
