PeoplePower73 answered great with the following:
"If you could define the root cause of what makes a person rich or poor, it would vary with each individual. I think you are trying to quantify something that has many facets and is dependent on each individuals circumstances. There is no one thing that determines man's mortal circumstances."
The book "Outliars" by Malcolm Gladwell goes into just this. How do those in successful positions get there. What is intriguing is that a lot of it doesn't have to do with the individual, but, more so their circumstance. "Outliars" goes into Bill Gates's success as well as many others. But, to some things up there are many people just as smart as Bill Gates or just as "beautiful" as Kim Kardashian. Yet, they are famous because of the things that happened in their life, unlike the others who are smart and "beautiful".
Infact, another contribution of this is simply "What month you are born" (also covered in "Outliars"). We would all like to think the underdog raised from nothing, but, in the end they had help to reach that position, even something as simple as the month they were born.
*This is why I dislike many celebrities and models that believe they are Gods gift to the world, when they simply have been -blessed- with a talent. Yes, they may have put in many hours of work to get there. But, based on the theory presented by "Outliars" they had help to get there, even something as simple as genetics.