Romeo and Juliet the 20th century, these moral arguments were disputed by critics such as Richard Green Moulton: he argued that accident, and not some character flaw, led to the lovers' deaths. In "Romeo and Juliet", Shakespeare employs several dramatic techniques that have garnered praise from critics; most notably the abrupt shifts from comedy to tragedy (an example is the punning exchange between Benvolio and Mercutio just before Tybalt arrives). Before Mercutio's death in Act three, the play is largely a comedy. After his accidental demise, the play suddenly becomes serious and takes on a tragic tone. When Romeo is banished, rather than
Romeo and Juliet sometimes been judged unfavourably because of its perceived liberties with Shakespeare; however, Bellini and his librettist, Felice Romani, worked from Italian sources—principally Romani's libretto for "Giulietta e Romeo" by Nicola Vaccai—rather than directly adapting Shakespeare's play. Among later operas, there is Heinrich Sutermeister's 1940 work "Romeo und Julia". "Roméo et Juliette" by Berlioz is a "symphonie dramatique", a large-scale work in three parts for mixed voices, chorus, and orchestra, which premiered in 1839. Tchaikovsky's "Romeo and Juliet" Fantasy-Overture (1869, revised 1870 and 1880) is a 15-minute symphonic poem, containing the famous melody known as the "love theme". Tchaikovsky's device of