It was the indifferent shrug and callous inertia that this 'optimism' concealed which so angered Voltaire, who found the 'all for the best' approach a patently inadequate response to suffering, to natural disasters - such as the recent earthquakes in Lima and Lisbon - not to mention the questions of illness and man-made war. Moreover, as the rebel whose satiric genius had earned him not only international acclaim, but two stays in the Bastille, flogging...