I agree with your comment, but I didn’t talk about economic structures, but rather about how power is distributed in a society. That is closely connected to the economic structure, sure. But for example the Soviet Union was state socialism and started enough wars themselves. Also not because the workers wanted it, but those in power did.
Greed was meant not only as greed for money but greed for power in general. Money itself is worthless, only its substitution for power is why it’s important in the first place.