Patrick Courrielche
In 2015, Courrielche wrote a long form story "St. Nicholas: The Birth Of A Social Weapon" on the origin of Santa Claus and introduced the concept of a "social weapon" - a packaged idea, message, or product that is used by an individual or group to advance their cause. Courrielche argued that New York City elites crafted Santa Claus from St. Nicholas, a widely known patron saint, to stabilize a city plagued by annual misbehavior every December. Santa Claus was then used as a "social weapon" by merchants, craftsman, city rulers, parents, newspapers, and others to benefit their endeavors. The essay was added to the St. Nicholas Center's resource on the Origin of Santa Claus.
Christmas elf
In Clement Clarke Moore's 1823 poem "A Visit from St. Nicholas" (more commonly known today as " 'Twas the Night Before Christmas"), Santa Claus himself is described in line 45 as, "He was chubby and plump, a right jolly old elf." Prior to the influence of St. Nicholas in Sweden, the job of giving out gifts was done by the Yule Goat. By 1891, the saint had become so well known that he could no longer be ignored. He became merged with Tomten, which was previously an elfish/dwarfish farm guardian. Following the work of artist Jenny Nyström, this hybrid figure became known as Jultomten.