 These special zones were created with the help of Power Assist Technology, which allowed Japan to recover from the consequences of the worldwide disaster (which included a combination of land subsidence and rising sea levels resulting in the permanent submerging of low-lying areas and a subsequent ice age in much of the Northern Hemisphere), albeit to a strictly limited degree.The Logos exercise control over the Revenus, a lower class who mostly live in devastated and often poverty stricken zones (urban or in close proximity) and areas (rural) known as "Levinas" (e.g.Levinas Sector Six, Area 18) and who struggle from day to day in order to stay alive.