Why was
Frodo made Ringbearer?
Although Frodo at first glance seemed the average
hobbit, he was not. "
There is a seed of courage hidden (often deeply, it is true) in the heart of the fattest and most timid hobbit, waiting for some final and desperate danger to make it grow. Frodo was neither very fat nor very timid; indeed , thought he did not know it, Bilbo (and Gandalf) had thought him the best hobbit in the Shire." (FOTR; Fog on the Barrow Downs)
Frodo was different than other
hobbits in the Shire. Besides suffering the trauma of being an orphan, he grew up with more education about the outside world because he lived with Bilbo.
Dwarves and Gandalf often visited
Bag End. Bilbo taught Frodo stories about the
Elves and even High
Elvish. This 'education" most likely helped Frodo be more open minded about the wide world and more wise than his peers. Above all, Frodo was also humble, and had no desire of power, perhaps his greatest strength. This is what enabled him to be able to carry
the Ring for so long and so far. The Ring feeds on the desire for power, which Frodo did not have.
Would any hobbit have this? Perhaps MOST hobbits did not have a desire for power, but Frodo also had an altruism that he felt that if he could destroy the Ring and save the Shire, it would be worth it.
Bilbo did volunteer to take the Ring to
Mordor. But what was his motive? Guilt? Adventure? Desire of the Ring? To save
Middle Earth? Most likely a combination of all. However, how many hobbits would CHOOSE to take the Ring? I absolutely love
Sam, however, I do not believe Sam would ever CHOOSE to take the Ring at the
Council of Elrond.
Frodo was humble, empathetic, kind, and wise. He was well aware that he did not have the great courage of a warrior. He started seeing with a keen eye, as
Galadriel noted. He had no desire for power, only to save the Shire. These were the strengths that were the opposite of the Ring and enabled him to carry it.
Frodo was not "made Ringbearer".
Eru did not make him Ringbearer. But everything was set in motion that would help give Frodo make the decision. Once he made that decision, Frodo was given the Grace (as
Tolkien put it in his Letters) to carry out his task. Perhaps this is what
Elrond meant when he said that this task was appointed for Frodo. A task may be appointed for a person, but they may not CHOOSE to take it. Frodo chose.
The concept of choice/free will is an important theme for Tolkien.