storylines can be found in the articles on each music drama. Wagner created the story of the Ring by fusing elements from many German and Scandinavian myths and folk-tales. The Old Norse Edda supplied much of the material for Das Rheingold, while Die Walküre was largely based on the Völsunga saga. Siegfried contains elements from the Eddur, the Völsunga saga and Thidrekssaga. The final Götterdämmerung draws from the 12th-century German poem, the Nibelungenlied, which appears to have been the original inspiration for the Ring. The Ring has been the subject of myriad interpretations. For example, George Bernard Shaw, in The Perfect Wagnerite, argues for a view of The Ring as an essentially socialist critique of industrial society and its abuses. Robert Donington in Wagner's Ring And Its Symbols interprets it in terms of Jungian psychology, as an account of the development of unconscious archetypes in the mind, leading towards individuation. Concept In his earlier operas (up to and including Lohengrin) Wagner's style had been based, rather than on the Italian style of opera, on the German style as developed by Carl Maria von Weber, with elements of the grand opera style of Giacomo Meyerbeer. However he came to be dissatisfied with such a format as a means of artistic expression. He expressed this clearly in his essay 'A Communication to My Friends', (1851) in which he condemned the majority of modern artists, in painting and in music, as "feminine ... the world of art close fenced from Life, in which Art plays with herself.' Where however the impressions of Life produce an overwhelming 'poetic force', we find the 'masculine, the generative path of Art'. Wagner unfortunately found that his audiences were not willing to follow where he led them: Finally Wagner announces: This is his first public announcement of the form of what would become the Ring cycle. In accordance with the ideas expressed in his essays of the period 1849–51 (including the "Communication" but also "Opera and Drama" and "The Artwork of the Future"), the four parts of the Ring were originally conceived by Wagner to be free of the traditional operatic concepts of aria and operatic chorus. The Wagner scholar Curt von Westernhagen identified three important problems discussed in "Opera and Drama" which were particularly relevant to the Ring cycle: the problem of unifying verse stress with melody; the disjunctions caused by formal arias in dramatic structure, and