I read somewhere that the map of earth would be devided into bands from the poles down and the centre band around the equator would be to hot to live.As the bands moved north or south we would grow things and at the more temporate bands we would all live as a single community. There would be only a northern or southern government and no separate countries. The arctic and antarctic regions would be used to store food as giant refrigerators.The population would have accepted controls to prevent overcrowding. None of this would happen until after many conflicts had proved to be so destructive that a central control formed of many countries representatives had been set-up. Peace was in the end, the only way that we would survive. But at what cost?