Tatishchev announced that he had proposed the idea to von Strahlenberg.
The Don River became unsatisfactory to northern Europeans when Peter the Great, king of the Tsardom of Russia, defeating rival claims of Sweden and the Ottoman Empire to the eastern lands, and armed resistance by the tribes of Siberia, synthesized a new Russian Empire extending to the Ural Mountains and beyond, founded in 1721.
The major geographical theorist of the empire was actually a former Swedish prisoner-of-war, taken at the Battle of Poltava in 1709 and assigned to Tobolsk, where he associated with Peter's Siberian official, Vasily Tatishchev, and was allowed freedom to conduct geographical and anthropological studies in preparation for a future book.
The Silk Road became the main East-West trading route in the Asian hitherland while the Straits of Malacca stood as a major sea route.
Asia has exhibited economic dynamism (particularly East Asia) as well as robust population growth during the 20th century, but overall population growth has since fallen.
Over the next century various proposals were made until the Ural River prevailed in the mid-19th century.
The border had been moved perforce from the Black Sea to the Caspian Sea into which the Ural River projects.
In general terms, Asia is bounded on the east by the Pacific Ocean, on the south by the Indian Ocean and on the north by the Arctic Ocean.
The western boundary with Europe is a historical and cultural construct, as there is no clear physical and geographical separation between them.
The chief factor in determining which islands of the Malay Archipelago are Asian has been the location of the colonial possessions of the various empires there (not all European).
Lewis and Wigen assert, "The narrowing of 'Southeast Asia' to its present boundaries was thus a gradual process." Geographical Asia is a cultural artifact of European conceptions of the world, beginning with the Ancient Greeks, being imposed onto other cultures, an imprecise concept causing endemic contention about what it means.
Asia was the birthplace of most of the world's mainstream religions including Christianity, Islam, Judaism, Hinduism, Buddhism, Confucianism, Taoism (or Daoism), Jainism, Sikhism, Zoroastranism, as well as many other religions.