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banks have evolved since the days of the Medici precisely in order (as the 3rd Lord Rothschild succinctly put it), to ‘facilitate the movement of money from point A, where it is, to point B, where it is needed’.48 Credit and debt, in short, are among the essential building blocks of economic development, as vital to creating the wealth of nations as mining, manufacturing or mobile telephony.
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Niall Ferguson (The Ascent of Money: A Financial History of the World: 10th Anniversary Edition)