““With the decline of clerical power in the eighteenth century, a new kind of mentor emerged to fill the vacuum and capture the ear of society. The secular intellectual might be deist, sceptic or atheist. But he was just as ready as any pontiff or presbyter to tell mankind how to conduct its affairs. He proclaimed, from the start, a special devotion to the interests of humanity and an evangelical duty to advance them by his teaching. He brought to this self-appointed task a far more radical approach than his clerical predecessors.””