Peppercorn is by far the most popular spice in the world. The second bestselling spice is commonly thought to be cumin or cinnamon, both commonly found in European and Asian dishes and spice mixes.
Curry, a mixture of seasonings including cumin and garlic, is prolific throughout much of the world, especially areas dense in population. Cinnamon, along with pepper, was one of the earliest traded spices, given to royalty and used as a divine offering. While salt is more plentiful and popular than pepper, salt is not considered a spice but rather a mineral. Spices are defined as something that comes from the seed, fruit, root or bark of a plant.