Why does language move some of us to anxiety or even rage? For centuries, sticklers have donned the cloak of authority to control how people use words. In this sensational new book, Robert Lane Greene strikes back to defend the fascinating, real-life diversity of this most basic human faculty. Along the way, he corrects Bill Bryson's 'facts' about words, challenges the rhetoric of Lynne Truss's bestselling Eats, Shoots and Leaves, and explains why speech is a lot like jazz. Travel with Greene on a rollicking world tour that shows the role language beliefs play in shaping our identities, for good and ill. From the Tower of Babel to Ataturk's banning of Arabic script, he charts how language 'experts' moved from myth-making to rule-making and from building cohesive communities to building modern nations. This enthralling book reveals that our arguments about language may relate to something else entirely, and illuminates the rewards of being flexible with our words. You Are What You Speak will certainly get people talking.