Few self-help (0) TRUISMS are as firmly entrenched as the idea that the early riser the virtuous life. Productivity books routinely successful executives who swear by their five a.m. alarms, as though waking before dawn were itself a of discipline. Chronobiologists, however, take a rather different view. They point out that our sleep preferences are largely to genetic factors rather than moral fibre, and that forcing a night owl to rise at daybreak is less likely to build character than it is to cumulative fatigue. The morning-person mythology may even be actively harmful, since it encourages workplaces to reward one chronotype while penalising another without regard for the underlying biology. What matters, researchers insist, is not when you wake but whether you sleep enough and at hours that your natural rhythm. The cultural prestige of the early hour, then, is best understood as a quirk of industrial scheduling up as moral truth — a reminder that even our most confidently held beliefs about productivity may up under scientific scrutiny.