A world without a government would be very chaotic. Literally, everything that a regular working person has to do from his waking moment can only be made possible with the intervention of the government. Crime would be prevalent, and with time poverty would kick in because of the absence of foreign exchange.
The world would not be under any exact set of laws, so those that pertain to natural instinct would probably take over (or that of a common nature). If you are self sustaining and have resources: land, food (seeds ad roots), means of transportation, then you would be at an advantage. Protection would be the biggest concern. You could check out the Venus project. There are many that have solutions to no government and no monetary system. Check out the Zeitgeist movie it has many solutions on his very subject. I personally do not agree, totally, with what these visionaries maintain, but I found them interesting. Venus Project: http://www.thevenusproject.com/ Zeigeist http://ww42.zeigeist.com/?kw=Zeitgeist