A sweeping history of the Age of Reason, which shows how, although it was a time of progress in many areas, it was also an era of brutality and intolerance, by the author of The Borgias and The Florentines.During the 1600s, between the end of the Renaissance and the start of the Enlightenment, Europe lived through an era known as the Age of ReasonThis was a revolutionary period which saw great advances in areas such as art, science, philosophy, political theory and economics.However, all this was accomplished against a background of extreme political turbulence and irrational behaviour on a continental scale in the form of internal conflicts and international warsIndeed, the Age of Reason itself was born at the same time as the Thirty Years'' War, which would devastate central Europe to an extent that would not be seen again until the twentieth century.The period also saw the development of European empires across world and a lucrative new transatlantic commerce began, which brought tr