In the story, Roland is the last living member of a knightly order known as gunslingers and the last of the line of “Arthur Eld,” his world's analogue of King Arthur. The world he lives in is quite different from our own, yet it bears striking similarities to it. Politically organized along the lines of a feudal society, it shares technological and social characteristics with the American Old West but is also magical. While the magical aspects are largely gone from Mid-World, some vestiges of them remain, along with the relics of a highly advanced, but long vanished, society. Roland's quest is to find the Dark Tower, a fabled building said to be the nexus of all universes. Roland's world is said to have “moved on”, and indeed it appears to be coming apart at the seams — mighty nations have been torn apart by war, entire cities and regions vanish without a trace and time does not flow in an orderly fashion. Even the Sun sometimes rises in the north and sets in the east. As the series opens, Roland's motives, goals and age are unclear, though later installments shed light on these mysteries.
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