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Thus, we can say that intelligent animals act with reasons, despite having no language, if their actions are clearly aimed at ends, especially if it is clear that they choose their instrumental acts on the basis of perceptions of the current environment. *Human practical resoning* begins in this aspect of our animal nature--our ability to learn in practice what we need to do in order to accomplish the things we need to accomplish if we are to flourish. Note that the issue here is learning in practice, and identifying correctly through our practice what we find to be needful for our flourishing. Reason, then, is grounded in the practice of flourishing.
And rather than look at "autonomous" adults, MacIntyre points out the obvious fact, usually overlooked by ethical theorists, that we are actually always dependent on each other in myriad ways. Our mutual dependency dictates that we need communities of giving and receiving various things--including education, formal and otherwise--not only to flourish but to be able to know, and reason, about flourishing. Without the virtues, the conditions for practical reasoning *at all* cannot exist.
The argument, then, is that our animality and dependency dictate what constitutes both flourishing and practical reason about flourishing, and that we can demonstrate that the virtues are necessary for being independent practical reasoners who flourish.
Rather, that's the strategy of the argument. The argument itself is, of course, much more involved. In its entirety, does it work? I'm not sure. I don''t know that everyone would agree with his axiomatic/unargued starting point, that to flourish requires us to be independent rational thinkers, even in the sense of "rational" he's spelled out here. We of democratic mien see thing that way, of course--but so far as I know, MacIntyre doesn't provide an argument for the overriding necessity of independence.
A couple of things are troubling--his apparent reliance on D.W. Winnicott's psychoanalytic account of child development, for instance. I'm not sure whether it really matters--so long as one accepts the notion that persons cannot develop into independent rational thinkers without the support of others, MacIntyre's affinity for Winnicott can be seen as a personal quirk, I think.
But that does lead to one perplexity: a lot of what MacIntyre says about the necessities of human life--matters of our dependence--is empirical, in a fairly straightforward sense, more than philosophical. Does this matter? It seems so to me. At least some of his argument turns on empirical claims about conditions for human flourishing for which he provides no argument or evidence.
Finally, MacIntyre sees current society as more or less beyond the pale ethically--according to him, neither our families nor our nation states promote virtue or independent practical rationality of the sort he has spelled out. One could conclude, of course, that we live in vicious ands heathen times, so to speak--and perhaps we do. Or one could wonder whether MacIntyre's empirical claims, and the philosophical argument he bases upon them, may not have more to do with his tastes than with the conditions of human flourishing. Is it really so obvious that in our culture we fail to flourish? Taken from the perspective of human history, our developed nation states have a few things going for them that resemble flourishing: the highest levels of material welfare, more equitably spread (in spite of the great distance we have to go in achieving equality); the most widespread education and highest rates of literacy; the lowest rates of infant mortality; the longest life spans; the greatest emphasis on human rights, including for women and minoeriites; the easiest access by non-elites to the arts; the cheapest books (relative to per capita income); the most efficient (if not yet ideal) institutions for international consultation and cooperation, and . . .
I like MacIntyre''s version of how life ought to be. I recommend reading the book. But I suggest that one not fail to note that his empirical claims are less than obviously true, while some empirical facts about our flourishing seem to have escaped his notice--or at least been given less weight than many folks would give them.
One other thing: This book is badly written. Never mind the needlessly poor sentence structure in which he so often indulges (and he obviously knows better, since he often writes clearly). But the structure of the argument and its exposition is generally less than transparent. (The reviewer who thought first that MacIntyre had gone soft reflects this fact.) For instance, on page 107, he tells us there are two ways that a certain thing is important, then spends twelve pages discussing the first--without ever getting around to identifying the second, so far as I can discern. That sort of sloppiness is not unusual in the book. Do you think maybe one of the minor virtues, one of the small obligations owed by people who write books for which they ask our money, is that they not be lazy about how they express themselves?