Then tell us who became wealthy by his own and only means, you wont found a single one because this is not possible.
Say that i invent a usefull thing, i wont make money out of it if i dont create a business where i recruit guys that work for me, could i build this facility myself and run it alone.?.
What will make me wealthy is that i can use a little part of the production to pay the workers and i keep all the rest for me, but for sure i didnt produce this money, that s all the fallacy of capitalism and was explained and proved in Marx s The Capital, notice that not a single captalist friendly economist did disapprove his findings or claim that he was wrong.
First, I would just like to point out to SPY, that yet another person believes you cannot get wealthy without making another person poor.
Also, Marx was wrong about a lot. There is a reason why the vast majority of economist dont advise policy that Marx suggested.
Wealth is created, and here a little example of how.
If one person has to hunt, cook, clean, make clothes ect, then he does not have the time to become great at all skills. He must survive first, and can only use spare time to refine his skills. A solitary person will be consumed with tasks and will not likely be able to become very skillful at anything. He may be born with a natural talent, but he will have to focus on doing other things to survive.
So, now add in a 2nd person. Person 1 is great at hunting, and Ok at everything else. Person 2 is great at making clothes, but ok at everything else. If Person 1 huts for both, then Person 2 can focus on making clothes for both. Because they both are better at their jobs, there is either a reduction in time, or an improvement in quality. That is what economists consider wealth. Both are now better off, and they had either more time, and or better quality that could then be leveraged to further improve their lives. Now, add a whole village, and you get even more wealth.
Now, I will explain how some can become wealthy while others do not.
Sometimes, some people are really really good at something. Maybe he was born with a natural talent. Maybe he was born in an area that had a lot of very skilled people, and he was able to train and refine his talent.
So, in this tribe, his skill is making clothes. Lets say this person can make 5 shirts a day, whereas another avg person would be lucky to make 1 shirt a day. This 1 person can save 5 people time that they could be working on something else. Because this person is so productive, he is able to sell many shirts. The people buying the shirts are happy, because not having to make shirts allows them to focus on things they are more productive at. Its a win win, but the majority of the benefit is likely to go to 1 person.
The person did not have to steal for his wealth. Also, it was not a zero sum, as the market actually increased because of his productivity. Further, the whole tribe would likely see improvements in their productivity because they could work on things they were better at, instead of having to try and make shirts.
As for an example of someone who made a billion dollars who did not have to steal, look up Jonathan Koon.
http://en.wikipedia.org/wiki/Jonathan_Koon