Anything written by psychologist Daniel Kahneman is usually worth reading, and his essay in the current issue of the journal Foreign Policy is no exception:
Modern psychology suggests that policymakers come to the debate
predisposed to believe their hawkish advisors more than the doves.
There are numerous reasons for the burden of persuasion that doves
carry, and some of them have nothing to do with politics or strategy.
In fact, a bias in favor of hawkish beliefs and preferences is built
into the fabric of the human mind.