Is rationality reasonable? : how ancient logos changes management theory

Rationality and reason are often used as synonyms, although they are very different concepts. In this article we argue that rationality is the concept of reason that has been stripped of its human elements. Ancient and medieval philosophers such as Aristotle and Aquinas stressed that the concept of reason is composed of sensitive, discursive, and moral elements. Post-Enlightenment thinkers instead, building on the works of René Descartes and Isaac Newton, took these out and claimed that rationality must be based on an external logic devoid of value-concepts such as perfection, harmony, meaning and aim (Koyré in From the closed world to the infinite universe, The Johns Hopkins University Press, Baltimore, 1957). The purpose of this essay is to highlight this shift in Western thought and its consequences for management theories. While explaining the ancient concept of reason in contrast with modern rationalism (Klein in: Williamson RB, Zuckerman E (eds) Jacob Klein - lectures and essays, St. John's College Press, Annapolis, 1985), we aim at raising awareness of the differences between building a research programme (especially in business sciences like economics and management) on rationality or on reason.