Philosopher Peter Bieri presents a very thorough approach of the phenomenon of human dignity from different angles. The book is not too condense or too moralizing, but it does require some attentive concentration while reading. Fortunately, Bieri illustrates his approach as much as possible with familiar examples from very known novels and plays. Arthur Miller's "Death of a Salesman" in particular, Edward Albee's "Who's Afraid of Virginia Woolf" and many other fictional works are discussed and quoted in depth.
The overall conclusion of Bieri is that human dignity is a very multiform thing: its perception and interpretation varies greatly from individual to individual, from group to group and from culture to culture. As far as the latter is concerned, my firm impression is that Bieri has limited himself only to Western culture, colored by modernism and its stress on individual independence and self-determination (however vague and problematic these terms may be). But even that limitation yields an enormous multicolored nature: dignity is a very dynamic thing, a complex fact that is constantly in motion, very depending on social contexts and like all human phenomena it has its extremes (into the absurd).
Anyone who starts this book with the expectation of getting a normative answer to the question of what exactly human dignity is, will be disappointed, and that is just the most important lesson of Bieri. And fortunately, the author does not lapse into the other extreme of a complete relativism: the notion of 'dignity' is indeed real, plays an important role in our lives, and is bound by specific (but flexible) rules and contexts. It has to be taken very, very serious!