Why do some people get jealousy about people who are in better position (like more successful) than them? Is there any logic behind jealousy? I mean, In my personal observation, I noticed that people get more jealousy about such people who are their friends/relatives. Why so? Is jealousy a stupid emotion?

I also noticed that some people never get jealousy about others. They feel happy about others' successes too. Is this the good attitude then?

How do feel? What are your comments?