It is a truism of today's political analysis that, over the three or four decades since the onset of the so-called "free-market" revolution that swept across the western world, the centre of political gravity has moved substantially rightwards.
Most of those of middle age or younger will have grown up, after all, in a world where it has been widely accepted that markets are more or less infallible, that government spending is inevitably wasteful and a drag on economic development, that running a country is just like running a business, that we all benefit if the rich get richer, and that private profit justifiably and inevitably overrides all other considerations.
So insidious and comprehensive has been the advance of this orthodoxy that even those who choose to question or oppose it are hard put to understand how complete and extensive has been its victory. Political leaders who seek to offer alternatives are disarmed and enfeebled, without realising it, by their experience of growing up within its confines. They are, in any case, urged - on electoral grounds and even by their friends - to understand and accept the new reality; and that reality, of course, keeps on moving rightwards.
One of the most significant consequences of this re-definition of the political landscape has been the acceptance that what would once have been regarded as at the extreme outer edge of what is politically possible is now the new centre ground. Any divergence from this central position is, by definition therefore, literally eccentric; and any move away from "free-market" orthodoxy is condemned as either a return to the past or an irrational lurch leftwards.
These definitions of centrality and divergence have had the further advantage, for their proponents, of confirming a long-held public perception. In the days when the political left was prepared to challenge existing power structures, they were undoubtedly helped by their development of, and adherence, to an ideology of sorts that allowed them to ground their objections to orthodox policies in some loosely defined analytical framework.