Greed existed before 1975. Are you saying Americans aren't greedy? And that is why they are so rich?
To be more specific: Lebanon was a country that had avoided the stuff going on elsewhere in the Middle East. The PLO gets involved, and the country implodes.
1) The cause of all human suffering is desire. The Buddhists have been pointing that out for millennia.
2) Greed is pretty much constant, people have been extremely greedy forever. The cause is the thing that changed to allow that greed to be channelled negatively. We've figured out how to channel greed for positive ends - in the process called a 'modern economy'. Greed is just a fuel, the issue is whether it is burning in an engine or burning uncontrolled.
It is getting into the weeds of philosophy, but they are separate concepts. Entities can be greedy without desire (eg, corporations are extremely greedy, but have no desire) and vice versa (eg, imagine an extreme desire for fresh air - it is hard to call that greed).
But to say greed causes suffering is untrue. The thing to underline in the last 200-300 years is that humans harnessed greed to deliver great results - the successive Asian economic miricles of the last century are not being caused by charity and goodwill! And the techniques that they are using were forged in some of the crucibles of most concentrated greed in human history. And while there was suffering, this was also where progress, peace and comfort came from.
The greed isn't the problem here, it is part of the solution. It just needs to be separated out from the other things going on and properly focused.
Ignorance of what though? How airfoils work? Or how to speak french? Ignorance of how acting on your urge to be greedy results in suffering? Sure. But I think the greed is still the thing causing the bad here.
To be more specific: Lebanon was a country that had avoided the stuff going on elsewhere in the Middle East. The PLO gets involved, and the country implodes.