But today, British and American politics are moving in very different directions. One reason is that changes of government, from one party to another, have become very infrequent in Britain. The only one the last 30 years, since Thatcher's victory in 1979, was Blair's in 1997. Indeed, the interval was the longest since Britain developed modern political parties in the mid-19th century.
That's pretty extraordinary: We Americans have had four changes of government since 1979. The only period in our history when we had just one in 30 years was in the early 1950s.
But a change in government does not always result in major changes in policy. As Defense Secretary Robert Gates, who has held important positions in two Democratic and four Republican administrations, argues in his memoir "From the Shadows," it's pretty hard to turn around the giant ship of state. Yes, new presidents and prime ministers usually make course corrections, and some of them have significant expected and unexpected effects. But not complete turnarounds.
In that perspective, Britain and America look rather similar. Only two leaders have made really major changes in policy, domestic and foreign, over the last 30 years, Thatcher and Reagan. Blair and Clinton accepted those changes and made some adjustments. The same can be said of the two George Bushes.
But now, economic distress and changes of government, actual here and likely next year there, raise the prospect of major changes in policy. And here we come to the second way in which British and American politics are moving in different directions.
Barack Obama is trying to move America considerably to the left, while David Cameron, whose Conservative Party is leading Prime Minister Gordon Brown's Labor Party by wide margins in the polls, may be aiming to move Britain some distance to the right.
It's not clear now whether Obama will succeed or what precisely a Prime Minister Cameron would do. On Capitol Hill, the labor unions' card check bill looks to be dead, the House cap-and-trade bill seems to be foundering in the Senate, and the Democrats' health-care bills are in some trouble.