Mid 20th Century, Selected Political Leaders
Note: These leaders are only the Presidents mentioned in Martin & Wasserman, Chapter 12, organized by the country the led.
Country  Dates  Leader Political comments
Argentina
-1922
Yrigoyen
Reformist
1922-28
Marcelo Alvear
Radical
1928-30
Yrigoyen
Military overthrew
1930-32
José Uriburu
Nationalist, rightist
1932-38
Agustín Justo
Conservative alliance, broadly based
1938-42 
Roberto Ortiz
Continued Conserv alliance
1942-43
Castillo
1943-55
Juan Perón (& Evita)
In power by mi coup; populist
Peru
1908-12 
Augusto Leguía
Backed by middle&lower classes 
1919-30 Reformist 
1930-33
Col Luis Sánchez Cerro
In by mil. Coup – “conservative populism”;  middle class support; assassinated 
1933-39
Gen. Benavides
Post WW2 & MNR
APRA
Chile
1920-24
Alessandri
Working class support; supported social reform
1924-27
Military coup ruled, led by Carlos Ibáñez
1927-31
Ibáñez – Pres.
Great Depr forced his resignation [?] 
Reformist 
1932-38
Alessandri
1938
Aguirre Cerda
Popular Front
Cuba
1920-24
Zayas
Post-1920 sugar dance of the millions
1925-33
Machado
Out by mil coup 
Reformist
1933-44; 
Batista
Took power in mil coup, then elected 
1952-59 Over-thrown by Castro
Mexico
1920s-mid30s
Reconstruction 
Middle-class demands; labor 
Limited land reform
1934-40
Cárdenas
PRI; land re-dstrns, oil expropriations, social welfare; orderly transitions through 50s; responsive to middle & working classes
1940-46
Ávila Camacho
1946-52
Alemán
1952-58
Ruiz Cortines
Brazil
1930-45; 1951-54
Vargas
Authoritarian populist
1955-60
Kubitschek
Guatemala
1930-45
Ubico
Dictatorship
Bolivia
1951-
MNR
Land reform, nationalize tin mines