"Today, because of the standard of living materialism provides those who follow the idea that some is good, more is better, too much is just right, much of the world "goes for the gold". Thus, although legal and religious proscriptions against greed have been in effect and given at least lip service for millennia, the fact remains that, as it was for Oog and Ugh, deep down inside people believe "greed is good". It might be disguised as capitalism, expanding the range of possibilities, or enlightened self-interest, but deep down inside it's greed"
To me this quote tells a lot. As I understand it, capitalism isn't creating greed, but capitalism IS greed "in a disguise". I am inclined to agree that especially the biggest advocators for capitalism without questions are just that, greedy. That said, I don't think that capitalism has made them greedy, but rather that they are greedy and supporting capitalism because of it. If it wasn't capitalism, there would be another way to achieve their lust for material goods.
I also agree with the historical context of trade, and I think that the author is making some interesting points.
"The desire for wealth is especially apparent in those cultures descended from or adhering to the Western European tradition of "progress" and "growth", a legacy of the eras of scientific discovery and world exploration. The former led people to believe that they could know everything, the latter increased what they knew and opened the world to trade. "
The author is referring to scientific discoveries as making people more greedy for knowledge, and thinking that they could know everything. If you take this as a fact, it becomes quite clear that you can't really blame capitalism or trade policies for that matter for making people greedy. Rather you should blame the whole Western way of life for birthing generations and generations of people who are inherently greedy. What this means to me is that even if greed was based on solely social standards, you would basically have to abolish the whole way of Western life, which is next to impossible.
In short, I think that the article does bring up some interesting points, but I do still feel that the basis of human greed while may be implemented to todays society from thousands of years ago are deep down from how humans are biologically. The need for survival in my humble opinion makes humans gather more and more resources for themselves and their relatives. As to if there ever would be a point where humans would feel comfortable with sharing their wealth with strangers, I'm not sure.