20th CENTURY - Neoclassical

From about 1929 onwards this style in music came about when composers reacted against ROMANTICISM and wanted to return to the structures and styles of earlier periods but still use DISSONANT TONAL and even ATONAL harmonies. In orchestral music, they tended to write for smaller orchestras, more like those of the CLASSICAL period (listen, for example, to the clear textures and small orchestra in the third track in the playlist, from Prokofiev's 1st Symphony). 

NB. It wasn't just CLASSICAL forms and styles that were used eg. Stravinsky's 'Dumbarton Oaks' (track 1 in the playlist) is written in the style of a CONCERTO GROSSO, which is of course a BAROQUE form. Another examples is the use of HARPSICHORDS in Poulenc's 'Concert Champetre' (track 4).

Stravinsky and Prokofiev were prominent composers of this style, although both wrote in other styles throughout their careers.