finding of alienation as an obstacle to a successful life, but attempts to contrast this description ex negativo with a positive counter-concept, the concept of resonance. Honneth, for example, has already made this attempt with the concept of recognition. Despite all the conceded vagueness and diversity of the concept of resonance, Rosa sees this as a universal concept that includes concepts such as recognition, justice or self-efficacy. Reception Rosa's work and the resonance theory formulated in it are controversially received and discussed. On the one hand, the author is attested originality and the courage to analyse the fundamental issues and, in contrast to the Critical Theory often summarised with Adorno's "There is no right life in the wrong one" ("Es gibt kein richtiges Leben im falschen"), the optimistic perspective is emphasised which is oriented towards potentials for overcoming the stated crisis. Such an appreciation of resonance theory as a positive continuation of critical theory can be found with Anna Henkel. Micha Brumlik sees in the comprehensive combination of interdisciplinary strands the completion, but with it also the end, of Critical Theory, which thereby loses its "theoretically informed irreconcilability looking coldly at society". On the other hand, it is precisely this comprehensive derivation of the concept of resonance from a multitude of perspectives and contexts that is criticized to the effect that "resonance" has an almost arbitrary effect, that the concept lacks precision, and that it is therefore ultimately unsuitable as a social-philosophical basic concept, as Rosa postulates it to be. Another point of criticism refers to Rosa's alleged recourse to the intellectual world of Romanticism, to which he wanted to return without pointing the way. Rosa does indeed frequently refer to the resonance sensitivity of Romanticism even in conscious contradiction to rationalist concepts, but at the same time sees the danger of purely subjective emotion instead of resonance in the way Romanticism thinks. Thus he rather describes the continuing effect of the resonance concepts of Romanticism in modernity, without propagating a return to it. Finally, Rosa's book argues that the socio-political outlook on concrete solutions is poor and that he ultimately fails to explain how resonance can be socially established as a response to the accelerating crisis of modernity. Despite the reference to political reform proposals such as that of an unconditional basic income and emerging pilot projects of a post-growth economy, Rosa himself rejects this claim, however, because he