Dan Ariely — Israeli Economist born on April 29, 1967,

Dan Ariely is the James B. Duke professor of Psychology and Behavioral Economics. He teaches at Duke University and is the founder of The Center for Advanced Hindsight and also the co-founder of BEworks. Ariely's talks on TED have been watched over 7.8 million times. He is the author of Predictably Irrational and The Upside of Irrationality, both of which became New York Times best sellers, as well as The Honest Truth about Dishonesty... (wikipedia)

It is helpful to think of people as having two fundamental motivations: the desire to see ourselves as honest, good people, and the desire to gain the benefits that come from cheating - on our taxes or on the football field.
Dishonesty is all about the small acts we can take and then think, 'No, this not real cheating.' So if you think that the main mechanism is rationalization, then what you come up with, and that's what we find, is that we're basically trying to balance feeling good about ourselves.
Because cheating is easier when we can justify our behavior, people often cheat in small amounts: We can come up with an excuse for stealing Post-It notes, but it is much more difficult to come up with an excuse for taking $10,000 from petty cash.
Disasters are usually a good time to re-examine what we've done so far, what mistakes we've made, and what improvements should come next.
Even the most analytical thinkers are predictably irrational; the really smart ones acknowledge and address their irrationalities.