The writings of J. B. Bury, on subjects ranging from ancient Greece to the 19th-century papacy, are at once scholarly and accessible to the layman. This work covers the period from the beginning of the Roman Empire until Gibbon begins; from Augustus through Marcus Aurelius and the Antoinine Emperors.

The great civil liberties we enjoy today, like Freedom of Speech and Freedom of the Press, have their foundation in Freedom of Thought. Without being able to freely explore all kinds of matter with an inquisitive mind, whether it be religious, political, societal, scientific, etc., any expression thereof is limited in and of itself. John Bagnell Bury tells the history of freedom of thought from its roots in Ancient Greece and Rome through the dark and restrictive Middle Ages and its renewed liberation in the Renaissance and the Reformation until the Rationalism of the 17th - 19th centuries. The focus of this book is on religious freethought, but the ideas and values of freedom of thought can be applied to any subject where rigorous thinking is beneficial.

John Bagnell Bury was Regius Professor of Modern History at Cambridge University in the early twentieth century. In The Idea of Progress, he assesses the concepts of history found in the classical period and then traces the historical development of the concept of political and social progress by looking at writers from the sixteenth to the nineteenth century. It is interesting to consider what the history of the past hundred years would add to such an analysis.