Etymology of Wicca latter would adopt it by the 21st century. This was part of a phenomenon that took place during the 1970s and 1980s, as the term "Wicca" became increasingly associated purely with Gardnerianism and Alexandrianism (together known as British Traditional Wicca in North America), rather than with other variants of Pagan Witchcraft. This was encouraged by elements within the Gardnerian and Alexandrian communities who wished to emphasise what they perceived as their special position within the Pagan community. The word "Wicca" first appeared in a book title in 1981 as "Wicca: The Ancient Way"; written by Janus-Mithras, Nuit-Hilaria and Mer-Amun and
Wicca oral teachings passed along to their initiates. There are many variations on the core structure, and the religion grows and evolves over time. It is divided into a number of diverse lineages, sects and denominations, referred to as "traditions", each with its own organisational structure and level of centralisation. Due to its decentralized nature, there is some disagreement over what actually constitutes Wicca. Some traditions, collectively referred to as British Traditional Wicca, strictly follow the initiatory lineage of Gardner and consider the term "Wicca" to apply only to similar traditions, but not to newer, eclectic traditions. Wicca is typically duotheistic,