South America avoided the all-out international total wars that consumed Eurasia in the twentieth century. (Civil wars are another matter.) But international events made themselves felt even here. Brazil had its own fascist party, the Integralists, with its paramilitary wing, the Green Shirts. However in Brazil, even the fascists couldn’t quite get into the whole National Socialist racial purity thing; the Integralist slogan called for a “Union of all races and peoples.” The Integralists fought the Communists in the early 1930s, but eventually both sides were suppressed by the dictatorial Estado Novo (New State) in 1937, led by Getúlio Vargas.
In much of the world at the time, liberalism and free trade were out, and nationalism and protectionism were in. In Latin America, this move went under the name of “populism,” favoring urban businessmen and workers at the expense of the old export-oriented land- and mine-owners. This often meant cultural as well as economic nationalism. Brazil today is famous for its Carnival celebrations, including samba parades. Ironically these took much of their current shape during the 1930s as a means of bringing rowdy public celebrations under official control: samba parades from this point on were officially sponsored, and were expected to march in orderly lines and to celebrate edifying nationalist themes. Early twentieth century samba musicians incorporated a variety of musical styles in their performances; in the 1930s, in the name of “authenticity,” they were encouraged to purge their music of foreign influences, including jazz.