The subject matter of this chapter is delimited by the English Revolution of 1688-9, which may be said to have been initiated by the beheading of Charles I in 1649, continues through the American Revolution of 1776, and the French Revolution of 1789, and extends to the final defeat of Napoleon in 1815. Dynastic revolutions have been common enough in history and these were by no means unique during the period here reviewed, but they have continued to have world-wide significance in their philosophical, social and political repercussions, while their manifest interlinkings render even a brief examination of their administrative substructures of special interest to us. Far into the future the next similar upheaval of equivalent impact was to be the Russian Revolution of 1917. Its roots are also dealt with in the present chapter.