And while Protestant reformers broke with Rome on a variety of counts, their treatment of their fellow human beings was no less disgraceful. Public executions were more popular than ever: heretics were still reduced to ash, scholars were tortured and killed for impertinent displays of reason, and fornicators were murdered without a qualm .16 The basic lesson to be drawn from all this was summed up nicely by Will Durant: "Intolerance is the natural concomitant of strong faith; tolerance grows only when faith loses certainty; certainty is murderous."17