The theory that the Pashtun people originate from the exiled Lost Tribes of Israel originated after the 19th century. Pasthuns are the largest ethnic group in Afghanistan and the second largest ethnic group in Pakistan. No scientific studies by any accredited organisations, or scholars, have upheld the claim. It continues to be believed by some Pashtuns, and has found advocates among some contemporary Muslim Pashtuns who try to increase their social status by claiming to be Semitic.