Tick, print, profit

Three psychotechnologies that brought an age to an end

A copy of 15th century Italian mathematician Luca Pacioli’s famous book “Summa de arithmetica,” which included the first-ever description of the practice of double-entry book-keeping. It sold for $1.2mil in 2019.

Can you put your finger on an age watershed?

The late Middle Ages witnessed a confluence of inventions that irreversibly transformed the intelle…