Mojo originated as a term with a specific meaning, but in the late 20th century became a very fluid term with many different meanings. It originated as a reference to a type of magic charm. The word traces its origins to Africa and entered English in the late 19th century or early 20th century through use by African-Americans. It reflects the belief, common in many cultures, that some people have the ability to influence others to their own advantage, by casting spells or hexes. In African-American folk beliefs, especially in the rural U.S. South early in the 20th century, a mojo was a small bag worn by a person under the clothes (also known as a mojo hand). Such bags were thought to have supernatural powers, such as protecting from evil, bringing good luck, etc. The mojo bag usually contained a mix of herbs, powders, sometimes a coin, and other objects thought to promote supernatural action or protection. The use of mojo bags is a characteristic of the southern American magical tradition of hoodoo.