"Listen Josef," said the Czech playwright Karel Čapek to his brother. "I have an idea for a play." Josef, an artist of some renown, was painting furiously and unimpressed by his brother's intrusion. "What kind of play?" he asked, sharply. Karel set out the plot.

Not many plays introduce a new word to the language. One that did was Karel Čapek's RUR: Rossum's Universal Robots that had its premiere in Prague 100 years ago this month. Every time we use the word "robot" to denote a humanoid machine, it derives from Čapek's play, which coined the term from the Czech "robota" meaning forced labour. But a play that was hugely popular in its time – its Broadway premiere in 1922 had a cast that included Spencer Tracy and Pat O'Brien as robots – has now fallen into neglect. Given our fascination with artificial intelligence, it's high time we gave it another look.