Charles Kindleberger argues that most, if not all, financial manias, p
anics, and crashes were market failures deriving from the irrational b
ehavior of human actors. Both his notion of rationality and his interp
retation of the sources of financial crises are open to question. A br
oader notion of rationality enables us to distinguish actual crises fr
om cases of fraud or entrepreneurial error, and a closer look at finan
cial history illustrates the ways in which government regulation, not
human irrationality, has been the source of financial disorder.