I have no idea what it is. I have never seen a good working definition of greed.
This is from Merriam Wester: a selfish and excessive desire for more of something (as money) than is needed.
So, if my monthly bills total $5,000 and I want to make $6,000 one month, is that being greedy?
Okay with that out of the way, don't mean to wreck your thread so I will guess 200,000 years ago.
I think it kind of ironic that you have particular difficulty defining greed. Not everything in life is always laid out easily for us in a "working definition" from Websters Dictionary.
Greed comes from fear: the fear that there is not enough.
I’m sorry goodwitch but I think you completely misunderstand what greed is and how it manifests. Greed is an interest in bettering yourself and in improving the world around you and in doing so, benefiting personally from your work. The benefits from greed includes everything from financial riches to feeling good about who you are. In the end, everything we do voluntarily is driven by some form of personal self interest, i.e. 'greed'.
I don't agree with the "improving the world around you" statement as it applies to "Greed." Greed to me implies a person who puts "self" above all others and things--if what he does happens to improve the world around him in accomplishing his selfish goals, it's more along the lines of a happenstance than a chosen goal.