Combine all the ingredients except the brown rice in a large, heavy pot. Cover and place over high heat. Bring to a boil, then reduce the heat to medium. Cover and cook at a medium boil for 2 hours, stirring occasionally until the chickpeas are just tender.
Add the brown rice, cover, and continue cooking for about ½ hour, stirring occasionally until chickpeas and rice are tender. Taste for seasonings.