Book 6
1
What is really educational and beneficial to students of history is the clear view of the causes of events, and the consequent power of choosing the better policy in a particular case. Now in every practical undertaking by a state we must regard as the most powerful agent for success or failure the form of its constitution; for from this as from a fountain-head all conceptions and plans of action not only proceed, but attain their consummation.
2
Some disconnected fragments which are usually placed at the end of the first chapter, and form the second chapter of this book, I have placed among the minor fragments at the end of these volumes. . . .
3
Of the Greek republics, which have again and again risen to greatness and fallen into insignificance, it is not difficult to speak, whether we recount their past history or venture an opinion on their future. For to report what is already known is an easy task, nor is it hard to guess what is to come from our knowledge of what has been. But in regard to the Romans it is neither an easy matter to describe their present state, owing to the complexity of their constitution; nor to speak with confidence of their future, from our inadequate acquaintance with their peculiar institutions in the past whether affecting their public or their private life. It will require then no ordinary attention and study to get a clear and comprehensive conception of the distinctive features of this constitution.
