I came across a series of four videos about the history of money which are really educative and I strongly recommend you taking the time to watch them.The videos are produced by Niall Ferguson ,who is Professor of History at Harvard University and William Ziegler Professor at Harvard Business School.
The Ascent of Money part 1
The Ascent of Money part 2
The Ascent of Money part 3
The Ascent of Money part 4
Discussion about his book: “The Ascent of Money”
Globalization: A keynote presentation by Professor Niall Ferguson with an introduction by Professor John Quelch Monday, October 13, 2008