If government had never existed, then the systematic destruction of cultures and societies would never have taken place. Governments spring up as an attempt to centralize the beliefs of a group of people. With this centralization of beliefs comes the ability of the government to mold its citizens into minions of the state. This in turn, allows the State to make decisions for it's citizens that should be left soley to each individual. This is a dangerous road to travel.
Anarchists believe that the government is responsible for chaos and mass destruction.
Just look at all the people who die as a result of the government's decisions. Governments essentially play God on a daily basis. They decide what is righteous and what is not. They send us off to die and and decide whom we will kill. When examined in such a context, it is difficult to draw a line between the Government and chaos.