The last support for the out of Asia theory was due to the finds of fossils such as the Dryopithecus and Ramapithecus in Eurasia up until the early 1980s. One of the last advocates of the out of Asia theory was Jia Lanpo who argued that the cradle of humanity had been in Southwest China, up until his death in 2001. Scholar Sigrid Schmalzer in her book The People's Peking man claims the only modern advocates of the out of Asia theory have their beliefs firmly rooted in Chinese Nationalism.[19]