This book analyzes Peter Barnes’ plays, The Ruling Class (1968), Leonardo’s Last Supper (1969), Noonday Demons (1969), and Dreaming (1969), as examples of modern Menippean satire. In contrast to formal verse satire, that is defined as a rhetorical attack upon a particular vice and includes praise for its opposite virtue in the midst of an argument, Menippean satire is difficult to define because of its protean structure. Therefore, whilst defining Menippean satire it is helpful to ask what Menippean satire ‘does’ instead of what Menippean satire ‘is’. Menippean satire is a mingling of prose and poetry in its simplest sense. In addition, it always desires to reject any sort of absolutes regarding norms, cultural, religious or philosophical dogmas by creating a carnivalesque atmosphere. Because Barnes has written about similar themes in Menippean satire form throughout his career his plays may be considered as examples of modern Menippean satire.