Karl Rahner’s Existential Ethics: A Critique Vased on St. Thomas’s Understanding of Prudence

KARL RAHNER'S EXISTENTIAL ETIDCS: A CRITIQUE BASED ON ST. THOMAS'S UNDERSTANDING OF PRUDENCE I KARL RAHNER'S THEORY of a "formal existential ethics," which he proposes as a necessary supplement to the "essential ethics" of the Thomistic naturallaw tradition, has been both praised as a brilliant adaptation of the tradition to contemporary philosophy as well as criticised as a misleading and unnecessary break with Thomism. William A. Wailace, one of the critics, characterizes Rahner's ethics as an unfortunate combination of mysticism and casuistry.1 Personal moral decision-making, according to Wallace , should depend on the virtue of prudence plus " gifts of grace" instead of on a theory of private spiritual discernment . A genuine Thomism in his view already achieves what Rahner wants to accomplish with the problematic category of existential ethics and simultaneously provides more coherent and explicit safeguards against situationalism and abuse.2 Rahner's chief expositor, James F. Bresnahan, claims in his extensive dissertation on Rahner's ethics that the extent of Wallace's misunderstanding of "the need for ' existential ' ethics is hard to convey in a short space," and that Wallace is wrong in thinking that Rahner displaces prudence.3 In the 1 William A. Wallace, O.P., "The Existential Ethics of Karl Rahner: A Thomistic Appraisal,'' in The Thomist, 1963, vol. 27, pp. 493-515. 2 Ibid., pp. 510-513. a James F. Bresnahan, S.J., The Methodology of "Natural Law" Ethical Reasoning In The Theology of Karl Rahner, And: Its Supplementary Development Using The Legal Philosophy of Lon L. Fuller, 1972 Ph.D. dissertation, Yale University (available from University Microfilms, Ann Arbor, Mich., no. 72: 29520), footnote 106, pp. 77-78. 461 46~ DANIEL M. NELSON course of this exchange, not much is said by either party about the characteristics of the virtue oi prudence itself. An investigation into the function and status assigned to prudence by St. Thomas may be of use for deciding whether existential ethics is in keeping with his moral teaching or, rather, a distortion . But first, in order to evaluate Wailace's criticism and claim that prudence is a preferable alternative to Rahner's proposal, a brief description of Rahner's categories of essential and exi,;tential ethics is in order.4 Rahner uses the category of essential ethics in two ways. First, he identifies it Yvith what he portrays as a somewhat static and conservative natural-law tradition. Second, he uses it to refer to his own description of a rehabilitated dimension of ethical reasoning that complements and calls for a supplemental category of existential ethics. Essential ethics in both cases refers to the moral principles or laws derived from knowledge of the essential elements of human nature. The difference has to do primarily with disagreement about what it is that constitutes human essence. According to Rahner, essence is much less unchangeable and much more " open " than traditionally or ordinarily assumed. As a consequence, he argues, claims about natural law should be less absolute and universal than they often are. Whether one understands essence as fixed or fluid, however, essential ethics involves a syllogistic application of natural law to circumstances. A universal principle based on human essence 4 An understanding of Rahner's ethics is macle difficult by several factors: his thinking is deeply indebted to " transcendental" Continental philosophy; some of the relevant texts and criticisms are available only in German; passages dealing with ethics appear in widely scattered (and unindexed) essays; he does not conceive of himself primarily as an ethicist and thus is not systematic in his discussion of his moral theory; his prose may be charitably described as challenging; and the only extensive analysis of his ethics written in English is Bresnahan's 650-page dissertation, which contains a wealth of information and explication. Bresnahan has published two helpful summaries: "Rahner's Christian Ethics: in America, 1970, vol. 123, pp. 351-354 ancl "Rahner's Ethics: Critical Natural Law in Relation to Contemporary Ethical Methodology," in the Journal of Religion, Jan. 1976, vol. 56, pp. 36-660. KARL RAHNER's EXISTE?~TIAL ETHICS 463 is contained in the major premise, an actual situation is described in the minor premise, and an imperative is...