Dating also varies considerably and those given are broad approximations across wide areas.
[1][2] Since these ages are distinguished by the development of technology, it is natural that the dates to which these refer vary in different parts of the world.
In many regions, the term Stone Age is no longer used, as it has been replaced by more specific geological periods.
Written records tend to provide more socio-political insight into the dominant nations, and hence allow categorization according to the ruling empires and cultures, such as Hellenistic, Roman, Viking.
From this time, the Industrial Revolution which began in Western Europe resulted in global trade and greatly increased cultural exchange.