nThe most important
characteristic of the postclassical world was the development of
a world network.
nInternational trade and
military contacts allowed all types of intellectual and material
exchanges.
nDiseases also spread.
nOnce established the
network expanded.
nIndividual
civilizations still maintained their essential values, but many were
operating in a genuinely international framework.
nThe major limitation
was that the Americas, Polynesia, Australia, and a few other
places were not yet included.