It’s a dull world in which children don’t challenge their parents

On the Shoulders of Giants consists of 12 essays that the late Umberto Eco gave as lectures at the annual Milanesiana festival of culture between 2001 and 2015. Judging from the book, seeing him deliver them must have been like going to a concert these days by Van Morrison or Bob Dylan. Sometimes he’s on top form, all the old magic thrillingly intact; quite often he seems to be rather going through the motions. And while he can always be relied on for a generous smattering of his greatest hits — conspiracy theories, William of Ockham, the Rosicrucians, Pseudo-Dionysius the Aeropagite — these too are performed with noticeably varying amounts of feeling and effort.

The best essay is the first, which includes a thorough history of the book’s title phrase, complete with Eco’s usual airy references to any number of obscure medieval thinkers. In 1675, Isaac Newton famously declared: ‘If I have seen further, it is by standing on the shoulders of giants.’