Anxiety
The philosopher Søren Kierkegaard, in "The Concept of Anxiety" (1844), described anxiety or dread associated with the "dizziness of freedom" and suggested the possibility for positive resolution of anxiety through the self-conscious exercise of responsibility and choosing. In "Art and Artist" (1932), the psychologist Otto Rank wrote that the psychological trauma of birth was the pre-eminent human symbol of existential anxiety and encompasses the creative person's simultaneous fear of – and desire for – separation, individuation, and differentiation.
The Concept of Law
"The Concept of Law" emerged from a set of lectures Hart delivered in 1952. The lectures were preceded by Hart's Holmes lecture, "Positivism and the Separation of Law and Morals" at Harvard Law School. The book developed a sophisticated view of legal positivism.