I realize that after decades of positive thinking the notion...

I realize that after decades of positive thinking the notion of realism, of things as they are, may seem a little quaint. ... When the stakes are high enough and the risks obvious, we still turn to people who can be counted on to understand those risks and prepare for worst-case scenarios. A chief of state does not want to hear a general in the field say that he 'hopes' to win tomorrow's battle or that he's 'visualizing victory' ...