If we declared all of the earth's resources as common heritage for all the world's people, and used the methods of science to construct and provide all of life's necessities for all people, then there would be considerable reduction in hunger, crime, war and poverty, not to mention unnecessary suffering due to lack of access of medical care or inadequate educational opportunities.
Seriously, this approach has been tried multiple times in history. Declaring all earth's resources as common implies in more hunger/crime/war/poverty.
Although Zeitgeist people do see the evil in the monetary system - and for sure there is - they fail greatly in understanding economics and ethics.
The main problem in the monetary system is the
monopoly of money and
central banking, not the existence of money itself. Money is fundamental.