It has made up parts of every supercontinent since. The oldest part of Afro-Eurasia is probably the Kaapvaal Craton, which together with Madagascar and parts of India and western Australia formed part of the first supercontinent Vaalbara or Ur around 3 billion years ago. Instead, it is the largest present part of the supercontinent cycle. Main articles: Eurasian Plate, African Plate, Indo-Australian Plate, and Arabian PlateĪlthough Afro-Eurasia is typically considered to comprise two or three separate continents, it is not a proper supercontinent. "Afro-Eurasia" generally includes those islands usually considered part of Africa, Europe and Asia. Mackinder defines the World Island as the large contiguous landmass, technically excluding islands such as Great Britain. Mackinder in his " The Geographical Pivot of History" (1904) and used in geopolitical contexts. Old World: a term from the Age of Discovery which, for European explorers, contrasted their previously known world from the New World of the Americas.Ecumene: a term from classical antiquity for the world as was known to ancient Greek scholars, which was limited to Europe and parts of Asia and Africa.The following terms are used for similar concepts: Afro-Eurasia encompasses 84,980,532 square kilometres (32,811,167 sq mi), 57% of the world's land area, and has a population of approximately 6.7 billion people, roughly 86% of the world population.
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