Jena is a university city in central Germany, on the river Saale. Population: 103,000. It is home to Zeiss, a manufacturer of optical systems. The world’s first modern planetarium was built in Jena in 1926 by Zeiss, whose slogan is: ‘We make it visible.’ Being able to see clearly, and far, is a speciality of the city.
Even so, the city is most famous for being the site of the Battle of Jena-Auerstedt, fought on 14 October 1806, a day when lack of visibility was the key issue. Hardly anyone knows that Jena actually has a much more important claim to fame, one that has relevance for all leaders everywhere.
When the sun rose on the fields near the city that fateful October morning in 1806, a mist rolled in to obscure ...