Critics have charged that Heidegger's account of authenticity is morally nihilistic, that his fundamental ontology is either egocentric or chauvinistic; and many see Heidegger's turn to Nazism in 1933 as following logically from an indifference, and even hostility, to "otherness" in the premises of his early philosophy.

In The Fragile "We": Ethical Implications of Heidegger's "Being and Time," Lawrence Vogel presents three interpretations of authentic existence—the existentialist, the historicist, and the cosmopolitan—each of which is a plausible version of the personal ideal depicted in Being and Time. He then draws parallels between these interpretations and three moments in the contemporary liberal-communitarian debate over the relationship of the "I" and the "We." His book contributes both to a diagnosis of what there is about Being and Time that invites moral nihilism and to a sense of how fundamental ontology might be recast so that "the other" is accorded an appropriate place in an account of human existence.

Mortality and Morality both consummates and demonstrates the basic thrust of Jonas's thought: the inseparability of ethics and metaphysics, the reality of values at the center of being.

A classic of phenomenology and existentialism, The Phenomenon of Life sets forth a systematic and comprehensive philosophy—an existential interpretation of biological facts laid out in support of his claim that the mind is prefigured throughout organic existence. Hans Jonas shows how life-forms present themselves on an ascending scale of perception and freedom of action, a scale reaching its apex in a human being's capacity for thought and morally responsible behavior.