> Polyandry is, in fact, a rare phenomenon, if not as rare as once thought,
and understanding of the variables that define the term is evolving. The
two best-known areas in which polyandry was studied and continued to
be practiced into the 21st century are the Plateau of Tibet (a region
shared by India, Nepal, and the Tibet Autonomous Region of China) and
the Marquesas Islands in the South Pacific. In a report published in
2012, however, anthropologists Kathrine Starkweather and Raymond Hames
identified 53 additional nonclassical societies throughout the world