https://www.daydreameducation.co.uk/poster-history-of-musical-theatre-2
https://www.daydreameducation.co.uk/poster-styles-of-musical-theatre
Pre - 1900 = Musical Comedies & Operettas1900 - 1929 = Musical Reviews & Broadway Extravaganzas
1930 - 1939 = Jazz Musicals & Naturalistic Dialogue
1940 - 1949 = The Golden Age
1950 - 1959 = Book Musicals & Romantic Comedies
1960 - 1969 = Counter-culture & Rebellion
1970 - 1979 = Rock Musicals
1980 - 1989 = Mega-musicals & Vast Concepts
1990 - 1999 = Jukebox Musicals & Revivals
2000 - 2009 = Reality TV Talent Contests
Most people tend to class Musical Theatre and Opera as two separate types of entertainment, however, Opera does count as a style of Musical Theatre. Although different vocal techniques are used for Opera and Musical Theatre, both involve exploring the plot through song and drama (and in Opera's case, through song the whole time, rather than being broken up by acted scenes). It is difficult to decide where the cross-overs are for Musical Theatre, but I believe that if a piece involves singing, acting and movement (i.e. the three threats) then it counts as Musical Theatre.
