A fundamental reason why Britain was not torn apart by civil war after 1688 was that its inhabitants' aggression was channelled so regularly and so remorsely into war and imperial expansion abroad.

In the last quarter of the 20th century, Britons have been understandably obsessed with the problem of having too little power in the world. In the third quarter of the 18th century, by contrast, their forebears were perplexed by the problem of having acquired too much power too quickly over too many people.

An unprecedented number of uniformed males, marching, parading and engaging in mock battles in every region of Great Britain brought a pleasant frisson of excitement into many normally quiet and deeply repetitive female lives.

For women to be supplying the soldiery with banners, flannel shirts and other material comforts was, superficially, all of a piece with their ministrations to their menfolk at home. Such contributions to the war effort were socially acceptable because they could be seen as an extension into the military sphere of the traditional female virtues of charity, nurture and needlework. Yet in reality what the women were doing represented the thin end of a far more radical wedge. Consciously or not, these female patriots were staking out a civic role for themselves. And many of them relished it.

Jacobitism involved much more than a debate about the merits of a particular dynasty. Men and women were well aware that its success was almost certain to involved them in civil war. And the more politically educated knew that the Stuart Pretender was a pawn in a worldwide struggle for commercial and imperial primacy between Britain and France.

From the 15th century to 1688, England and Wales, like Scotland, had been peripheral kingdoms in the European power game, more often at war with each other that with Continental powers, and - except under Oliver Cromwell - scarcely very successful on those occasions when they did engage the Dutch, or the French, or the Spanish.

These developments - a massive transfer of land by way of inheritance and purchase, an unprecedented rise in the profitability of land and increasing intermarriage between Celtic and English dynasties - helped to consolidate a new unitary ruling class in place of the more separate and specific landed establishments that had characterised England, Scotland, Wales and Ireland in the Tudor and Stuart eras.