The "Free Peoples of Middle-earth" refers to the various races and cultures in J.R.R. Tolkien's fictional world, primarily featured in his works like The Hobbit and The Lord of the Rings. These groups include Humans, Elves, Dwarves, Hobbits, and Ents, who unite against the dark forces of Sauron and his minions. Each race has its own unique characteristics, languages, and histories. For example, Elves are known for their grace and longevity, while Dwarves are skilled craftsmen and warriors. Together, these Free Peoples strive to protect their lands and maintain peace in Middle-earth.