Professor James Shapiro goes in search of the mysterious man behind The Duchess of Malfi, the son of a coachmaker who ended up rivalling Shakespeare.

The English language is spoken by 450 million people around the globe, with a further one billion using it as a second language. It is arguably Britain’s most famous export. The man often given credit for the global triumph of English, and the invention of many of our modern words, is William Shakespeare. Shakespeare’s plays first hit the stage four centuries ago, as the explorers of Elizabethan England were laying the foundations for the British empire. It was this empire that would carry English around the world. Language historian and BBC New Generation Thinker Dr John Gallagher asks whether the real story of how English became a global linguistic superpower is more complex.