The species concept is one of the oldest and most fundamental in biology. And yet it is almost universally conceded that no satisfactory definition of what constitutes a species has ever been proposed. The present article is devoted to an attempt to review the status of the problem from a methodological point of view. Since the species is one of the many taxonomic categories, the question of the nature of these categories in general needs to be entered into.

This is an EXACT reproduction of a book published before 1923. This IS NOT an OCR'd book with strange characters, introduced typographical errors, and jumbled words. This book may have occasional imperfections such as missing or blurred pages, poor pictures, errant marks, etc. that were either part of the original artifact, or were introduced by the scanning process. We believe this work is culturally important, and despite the imperfections, have elected to bring it back into print as part of our (...) continuing commitment to the preservation of printed works worldwide. We appreciate your understanding of the imperfections in the preservation process, and hope you enjoy this valuable book. (shrink)

In recent years the concept of eros has found its way back into educational literature with the aim of integrating human desires into educational theories and counteracting a devaluation of emotional life. This paper holds the view that this integration is important because desire expresses a fundamental way of relating to the world. However, part of the literature on eros and education also rethematizes the concept of eros as an educational value in support of democracy. The paper argues that the (...) binding together of eros and democracy is based on a one-sided description of eros, which is too hasty when we look at the plurality of lived desires. (shrink)

Alasdair MacIntyre criticises the ethics of modernity as fallacious, and wants it replaced by Aristotelian virtue ethics. He is particularly critical concerning modernity’s non-contextual understanding of reason, and wants to renew the ethical significance of concepts like tradition and context.

In search of general generative principles I start from the postulate of a reality which comprises both materialistic and psychic aspects. This overall reality, described by others as the world of archetypes, is not directly accessible to sensory perception. Yet, by studying archetypical manifestations, it is possible to distinguish different structures or generative principles in it. Comparison of three models, which depict developmental processes in different disciplines, shows that they have the same basic structure. The effects of the archetypes involved (...) can be described as four general generative principles: 1st the principle of wholeness (connection and integration of conflicting opposites), 2nd the principle of complementation and compensation (periodic change of opposite influences); 3rd the enstructuring principle (relative stability or spatial aspect of a manifest structure), and 4th the principle of gesture (change or temporal aspect of that structure). (shrink)