For Stebbing (recall) clarity is a property of cognition and intelligence. Clarity is necessary condition for success at thinking and action guided by it, or what she calls "effective thinking." (5) In particular, clarity is the absence of distortions in thought and perception caused by bias and ignorance one is not aware of. That is, undistorted or unbiased thought is what's being aimed at in describing something as ‘clear.’
But her suggestion is that known biases and awareness of ignorance are not an obstacle to successful thought presumably because they can knowingly be controlled for. Clarity is, in fact, for Stebbing an acquired skill that can be controlled and that makes "rational argument and… reasonable consideration" possible. A feature of the skill is logically sound argument. Unsurprisingly, awareness and discovery of possible fallacies play a prominent role in Stebbing's (1938) Thinking to Some Purpose.
As I noted, there is a whiff of Spinozism in her treatment of clarity. We know she was familiar with Spinoza’s system, which she discusses, in passing in her (1932) “The Method of Analysis in Metaphysics.” She deliberately evokes the last sentence of Spinoza's Ethics in the last sentence of the "epilogue" of her book:
My point of view with regard to this topic can be summed up in the statement: He alone is capable of being tolerant whose conclusions have been thought out and are recognized to be inconsistent with the beliefs of other persons. To be tolerant is not to be indifferent, and is incompatible with ignorance. My conclusions have been reasonably attained in so far as I have been able to discount my prejudices, to allow for the distorting effects of your prejudices, to collect the relevant evidence and to weigh that evidence in accordance with logical principles. The extent to which I can achieve these aims is the measure of my freedom of mind. To be thus free is as difficult as it is rare.-- Susan Stebbing Thinking to Some Purpose, p. 256.
Clarity, then, is a means toward freedom of mind, but also its measure. (Clarity clearly comes in degrees for Stebbing.) To avoid confusion, in that quoted paragraph, 'logical principles,' include deductive and inductive logic.
Now 'freedom' is not introduced until the epilogue. I will quote the key paragraph to give a flavor of Stebbing's use of it:
I believe also that similar strictures could be truly made with regard to polls held recently in Germany and in Austria. Elections in this country are not in this sense unfree. We are proud to consider ourselves a democracy; we claim to have freedom of election, freedom of speech (including freedom of the Press) limited only by the laws of libel, sedition and blasphemy, and freedom in religion. No doubt there are certain qualifications to be made; it is probable that most people would admit that without economic freedom there cannot be political freedom, and that lacking economic security no man can be regarded as economically free. But, even if these admissions be granted, it will be contended that, by and large, we in this country do have institutions that may properly be described as democratic. It is not to my purpose to dispute these contentions. Nor shall I attempt to determine what characteristics are essential to democracy. It is enough if it be granted that it lies in our national temper to dislike obvious governmental restrictions. We like to feel ourselves to be free. In short, we value civil liberties. (249)
Here 'freedom' means something like the 'means conducive toward democratic life,' including economic, political, and civil means. So, one might think that by a 'free mind,' Stebbing also means 'the mental state conducive, at least in part, toward a democratic life.' I think this is what she does mean (as I will show in the next paragraph.) But, somewhat confusingly, Stebbing goes on to write, "I deliberately omit, however, any discussion of such political obstacles to freedom as we may encounter. I am not concerned with politics. My topic is freedom of mind. Unless I can think freely I cannot think effectively." (250) And so one might think that in so far as a 'free mind' has nothing to do with politics -- and democratic life is of political significance -- that by a 'free mind' Stebbing means something essentially private.
But that would not be right conclusion, because she immediate goes on to write, "Here ‘I’ stands for any person. If I want to make up my mind upon any problem of political action, I must be able to deliberate freely. If it were in fact true that we were all politically and economically free, still it would not follow that we were possessed of the freedom of mind without which, in my opinion, no democratic institutions can be satisfactorily maintained." (250) So, by 'politics' on the same page, Stebbing means not 'pertaining to political life,' but rather 'subject to existing political controversy' (in the sense of which "political measure" (254) to support.) For, by a 'free mind' Stebbing clearly means a key, effective ingredient that makes public deliberation possible and so is conducive to democratic institutions, that is, political life in the institutional sense (but not in the humdrum sense of a 'subject of political controversy').
So, clarity is a skill conducive to the kinds of agency involved in public deliberation of a sort that maintains democratic institutions or democratic way of life. And by 'democracy' Stebbing means a participatory one that is exercised in voting but also (as her examples in the book make clear) in the formation of public opinion of the sort familiar from British parliamentary democracy. As she puts it 'democratic government' is more than just "the consent of the governed," -- this she thinks is actual in British political life -- but rather it means that "the voice of the people prevails." (254) The latter she denies exists because the British populace lacks freedom of mind.
Now, as Stebbing notes, her book has emphasized obstacles to such freedom: "the difficulty of freeing our minds from blinkers, the difficulty of resisting propaganda and of being content to be persuaded where we should have striven to be convinced, the difficulties of an audience dominated by an unscrupulous speaker and the difficulties of a speaker who has to address an audience that is lazy and uncritical – in short, the difficulties created by our stupidity and by those who take advantage of that stupidity." (250) But in the epilogue she focuses on "the difficulty of obtaining information – the difficulty of knowing how to discover reliable testimony." And by this she means, in particular, the way the press shapes access to information.
In light of the concentrated ownership of the press, and its interests in withholding or shaping such information, and in light of many examples of partial or biased reporting that Stebbing discusses, Stebbing concludes:
I am forced to say this; if my belief in the reliability of the testimony is false, then I am not free to decide. If such information as I have is not to be trusted, then I lack freedom of decision. For this reason, those who control the Press have power to control our minds with regard to our thinking about ‘all public transactions’. A controlled Press is an obstacle to democracy, an obstacle that is the more dangerous in proportion as we are unaware of our lack of freedom. (253)
The implication being that the British seem to think that they have free minds, but in reality -- because they do not reflect on the conditions that shape their access to the information salient to public life and do not seem perturbed by their controlled press -- they are not. They "acquiesce" in rule by a narrow elite, "the ruling class," whose decisions "control us." (254) Empirically, Stebbing echoes, thus, the sociological thesis (associated with Pareto, Mosca, and Michels) that one can have elite rule even in a functioning parliamentary democracies. Unlike the Italian elite school, she deplores this situation.
Now, it is natural to read Thinking to Some Purpose, and come away thinking that to think clearly and to become free requires a lot of very time-consuming individual effort at self-betterment. And one can certainly cite passages to that effect: "I do seek to convince the reader that it is of great practical importance that we ordinary men and women should think clearly, that there are many obstacles to thinking clearly, and that some of these obstacles can be overcome provided that we wish to overcome them and are willing to make an effort to do so." (29) She closes the book with the admonition that "I...would maintain that it is desirable that we should develop in ourselves a habit of sceptical inquiry." (255) These are passages where Stebbing, thus, anticipates Arendt's conception of democratic life.
But as the book unfolds and reaches its crescendo in the epilogue, it is obvious that Stebbing also thinks that there are many structural obstacles to removing all such impediments to clear thinking. Even if one grants that Stebbing's rhetoric is designed as a kind of call to action (say to break up the ruling class monopoly on ownership of the popular press), somewhat disappointingly, she does not offer a program of how those obstacles can be removed while not undermining the possibility of a democratic life in the deliberative and self-governing sense she advocates. (She does not offer any program!)
It is also not entirely clear on Stebbing's account what to make of a people that does not seem to wish to be free in Stebbing's sense, as she implies of the English: "The vast majority of English people want to be governed peaceably, and want to be free to pursue their own unpolitical interests." (254) This echoes Lippmann's (1922) diagnosis of the (American) democratic public in Public Opinion. It is worth noting that even if one agrees with Stebbing's diagnoses, the English are not irrational. For it is, in fact, very hard work to be free in the sense she advocates, and as the concluding paragraph quoted above suggests, she is explicitly aware of this. (In fact, I like that she notes how difficult achieving tolerance is.) In addition, given the obstacles to such freedom she diagnoses, it also seems rather fruitless and (ought implies can) not required or unnecessary to be free in the political or democratic sense advocated by Stebbing. To be sure, for many unpolitical pursuits such freedom, clear thought, will be necessary for effective action and within reach.
Given the many economic and educational preconditions required and the demands on our time and attention that a life of thinking clearly requires on Stebbing's account, it is a bit surprising that she does not explore the psychological, collective, or institutional means we might have to organize our lives in complex epistemic and political environments. For example, while I have no interest in defending the English or its ruling class (then or now), but if it's true that its "ruling class, [is] educated for political purposes, trained from birth to undertake the responsibilities of ruling" (254) then this does represent (one might say echoing Schumpeter) a possible, even rational response to the structural impediments to creating a mass society of free minds in the political sense Stebbing diagnoses (even if it is also a contributing cause to maintaining such political tutelage).
In fact, Stebbing clearly thinks that attachment to a political party is a contributing source of bias and so of not thinking clearly. (This is especially clear in chapter 8, see p. 98 on party attachment.) Throughout Thinking to Some Purpose, she often uses politicians of opposing parties as examples to illustrate biased thinking. And by varying these examples she tries to be even-handed and entice her readers to discern the structural obstacle(s) to clear thinking she diagnoses.
It does not seem to occur to Stebbing, however, that part of the epistemic or cognitive function of parties may well be to provide useful signals in complex social and political environments for cognitively overburdened or agents without sufficient interest in political life. (One may well think that one of liberal democracy’s fruits is that such a lack of interest in active political life need not be irrational.) So, because Stebbing treats clarity as a property of individual minds who must almost possess the virtues of a Spinozistic sage, she misses how in the division of (cognitive and economic) labor, we might well have strategies or heuristics that allow individuals to remain in partial darkness while being part of collectives that can act with sufficient enough effectiveness.*
*One may well see the exact contemporary, Lippmann's (1938) The Good Society, as developing this strategy, and laying the groundwork for a research and political program for handling the problems diagnosed by Stebbing.