(More on how Gandalf acquires a ring later.) And, as we saw when the dwarf rings were created, Sauron is able to actively participate in the forging of those rings (and, later, the rings of men). Thus ...
Gandalf was sent to Middle Earth to help its inhabitants combat ... heralding a new era of prosperity and increased cooperation between humans, Elves, and Dwarves. He becomes widely known as King ...