Contrary to received wisdom, the British are not an insular people in the conventional sense - far from it. For most of their early modern and modern history, they have had more contact with more parts of the world than almost any other nation - it is just that this contact has regularly taken the form of aggressive military and commercial enterprise.

At one level Great Britain at the beginning of the 18th century was like the Christian doctrine of the Trinity, both three and one, and altogether something of a mystery.

Loyal and substansial Catholic service on the battlefield undermined one of the most longstanding objections to emancipation: namely, that since Catholics owed religious allegiance to a foreign authority in the person of the Pope, their political and patriotic allegiance must necessarily be suspect.

Virtually every war fought since the Act of Union had gone badly at some stage, but before 1783 none had ended in defeat. Nor would any major war in which Britain was involved after this date end in defeat. Those who are curious about this country's peculiar social and political stability probably need look no further than this for essential cause.

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.

Human beings are many-layered creatures, and do not succumb to the hegemony of others as easily as historians and politicians sometimes imply. Those Welsh, Scottish and Anglo-Irish individuals who became part of the British Establishment in this period did not in the main sell out in the sense of becoming Anglicised look-alikes. Instead, they became British in a new and intensely profitable fashion, while remaining in their own minds and behavior Welsh, or Scottish, or Irish aswell.

Chilvalry's essential function, Maurice Keen has written, is always to hold up an idealised image of armed conflict in defiance of the harsh realities of actual warfare. By definition, chivalry also reaffirms the paramount importance of custom, hierarchy and inherited rank.