A modern classic, this powerful and sophisticated account of embodiment was first published in German in 1928 and now appears in English for the first time. With reference simultaneously to science, social theory, and philosophy, Plessner shows how life can be seen on its own terms to establish its own boundaries. Plessner's account of how the human establishes itself in relation to the nonhuman will invigorate a range of current conversations around the animal, posthumanism, the material turn, and the biology and sociology of cognition.

The groundbreaking classic of twentieth-century German philosophy now available in English—with an introduction by J.M. Bernstein. Helmuth Plessner’s Levels of Organic Life and the Human, draws on phenomenological, biological, and social scientific sources to offer a systematic account of nature, life, and human existence. The book considers non-living nature, plants, non-human animals, and human beings a sequence of increasingly complex modes of boundary dynamics—simply put, interactions between a thing’s insides and the surrounding world. Living things are classed and analyzed by their “positionality,” or orientation to and within an environment. According to Plessner’s radical view, the human form of life is excentric—that is, the relation between body and environment is something to which humans themselves are positioned and can take a position. This “excentric positionality” enables human beings to take a stand outside the boundaries of their own body, a possibility with significant implications for knowledge, culture, religion, and technology. A powerful and sophisticated account of embodiment, the Levels shows, with reference both to science and to philosophy, how life can be seen on its own terms to establish its own boundaries, and how, from the standpoint of life, the human establishes itself in relation to the nonhuman. As such, the book is not merely a historical monument but a source for invigorating a range of vital current conversations around the animal, posthumanism, the material turn, and the biology and sociology of cognition.

The most important work by a key figure in German thought, Helmuth Plessner’s Levels of Organic Life and the Human, originally published in 1928, appears here for the first time in English, accompanied by a substantial Introduction by J. M. Bernstein, after having served for decades as an influence on thinkers as diverse as Merleau-Ponty, Peter Berger, Habermas, and the new naturalists. The Levels, as it has long been known, draws on phenomenological, biological, and social scientific sources as part of a systematic account of nature, life, and human existence. The book considers non-living nature, plants, non-human animals, and human beings in turn as a sequence of increasingly complex modes of boundary dynamics—simply put, interactions between a thing’s insides and surrounding world. On Plessner’s unique account, living things are classed and analyzed by their “positionality,” or orientation to and within an environment. “Life” is thereby phenomenologically defined, and its universal yet internally variable features such as metabolism, reproduction, and death are explained. The approach provides a foundation not only for philosophical biology but philosophical anthropology as well. According to Plessner’s radical view, the human form of life is excentric—that is, the relation between body and environment is something to which humans themselves are positioned and can take a position. This “excentric positionality” enables human beings to take a stand outside the boundaries of their own body, a possibility with significant implications for knowledge, culture, religion, and technology. Plessner studied zoology and philosophy with Hans Driesch in the 1910s before embarking on a highly productive philosophical career. His work was initially obscured by the superficially similar views of Max Scheler and Martin Heidegger and by his forced exile during World War II. Only in recent decades, as scholarship has moved more squarely into engagement with issues like animality, embodiment, human dignity, social theory, the philosophy of technology, and the philosophy of nature, has the originality and depth of Plessner’s vision been appreciated. A powerful and sophisticated account of embodiment, the Levels shows, with reference both to science and to philosophy, how life can be seen on its own terms to establish its own boundaries, and how, from the standpoint of life, the human establishes itself in relation to the nonhuman. As such, the book is not merely a historical monument but a source for invigorating a range of vital current conversations around the animal, posthumanism, the material turn, and the biology and sociology of cognition. This modern philosophical classic, long-awaited in English translation, is a key book both historically and for today’s interest in understanding philosophy and social theory together with science, without reducing the former to the latter.

In this classic of philosophical anthropology, Helmuth Plessner investigates the significance of laughing and crying, both in themselves and in relation to human nature.

In Political Anthropology (originally published in 1931 as Macht und menschliche Natur), Helmuth Plessner considers whether politics--conceived as the struggle for power between groups, nations, and states--belongs to the essence of the human. Building on and complementing ideas from his Levels of the Organic and the Human (1928), Plessner proposes a genealogy of political life and outlines an anthropological foundation of the political. In critical dialogue with thinkers such as Carl Schmitt, Eric Voegelin, and Martin Heidegger, Plessner argues that the political relationships cultures entertain with one other, their struggle for acknowledgement and assertion, are expressions of certain possibilities of the openness and unfathomability of the human. Translated into English for the first time, and accompanied by an introduction and an epilogue that situate Plessner's thinking both within the context of Weimar-era German political and social thought and within current debates, this succinct book should be of great interest to philosophers, political theorists, and sociologists interested in questions of power and the foundations of the political.

The search for life in the solar system and beyond has to date been governed by a model based on what we know about life on Earth (terran life). Most of NASA's mission planning is focused on locations where liquid water is possible and emphasizes searches for structures that resemble cells in terran organisms. It is possible, however, that life exists that is based on chemical reactions that do not involve carbon compounds, that occurs in solvents other than water, or that involves oxidation-reduction reactions without oxygen gas. To assist NASA incorporate this possibility in its efforts to search for life, the NRC was asked to carry out a study to evaluate whether nonstandard biochemistry might support life in solar system and conceivable extrasolar environments, and to define areas to guide research in this area. This book presents an exploration of a limited set of hypothetical chemistries of life, a review of current knowledge concerning key questions or hypotheses about nonterran life, and suggestions for future research.