“The division of history into periods is not a fact, but a necessary hypothesis or tool of thought, valid in so far as it is illuminating, and dependent for its validity on interpretation.”
E.H. Carr ‘What is History?’
For anyone who doubts we are living in the era of mixed messages consider this un-photoshopped image, captured in Stanhope Gardens, London, N4, 29/09/2012.