Required Reading:
Edward Bellamy, Looking Backwards (1887), especially chapter 9, available on-line.
"The Future of Money"--Walter Wriston interviewed by Thomas A. Bass, Wired 4: 10 (1996), on-line.

Further Reading:
David Boyle, Funny Money (2000).
Benjamin J. Cohen, The Future of Money (2005).
Bernard Lietaer, The Future of Money (2002), extracts on-line.
William Morris, News from Nowhere (1890), on-line.