During the 1930s, the ACLU started to engage in work combating police misconduct and Native American rights.

During the 1930s and 1940s Joseph Stalin's NKVD carried out numerous assassinations outside of the Soviet Union, such as the killings of Organization of Ukrainian Nationalists leader Yevhen Konovalets, Ignace Poretsky, Fourth International secretary Rudolf Klement, Leon Trotsky, and the Workers ' Party of Marxist Unification ( POUM ) leadership in Catalonia.

During the 1930s other ideas were proposed as non-standard cosmologies to explain Hubble's observations, including the Milne model, the oscillatory Universe ( originally suggested by Friedmann, but advocated by Albert Einstein and Richard Tolman ) and Fritz Zwicky's tired light hypothesis.

During the 1930s, the silent film comedy was replaced by dialogue from film comedians such as the W. C. Fields and the Marx Brothers.

During the 1930s, multiple acts of cannibalism were reported from Ukraine and Russia's Volga, South Siberian and Kuban regions during the Soviet famine of 1932 – 1933.

During the 1930s, the original art for a daily strip could be drawn as large as 25 inches wide by six inches high.

During the 1930s, the original art for a Sunday strip was usually drawn quite large.

During the 1930s and 40s, significant improvements were made to the ground, making it one of the largest in the country at that time.

During the 1930s the French Army experimented with integrating mounted and mechanised cavalry units into larger formations.

During the 1930s and early 1940s, Alston created illustrations for magazines such as Fortune, Mademoiselle, The New Yorker, Melody Maker and others.

During the early 1930s throughout Europe, Jewish owners of numerous fine art masterpieces found themselves forced to give up or sell off their collections for minimal prices due to anti-Jewish laws created by the new Nazi regime.

During the late 1920s and early 1930s Eisenhower's career in the post war army stalled somewhat, as military priorities diminished ; many of his friends resigned for high-paying business jobs.

During the 1920s and 1930s destroyers were often deployed to areas of diplomatic tension or humanitarian disaster.

During the Great Depression of the 1930s, John Maynard Keynes authored a book entitled The General Theory of Employment, Interest and Money outlining the key theories of Keynesian economics.

During the 1920s and 1930s, Aimee Semple McPherson was a controversial faith healer of growing popularity during the Great Depression.

During the latter's dictatorship in the 1930s, Guatemala was further opened up to foreign investment, with special favors being made by Ubico to the United Fruit Company in particular.

During the late 1930s and through the 1940s — the heyday of big band jazz and swing music — the guitar was an important rhythm section instrument.

During the early 1930s, the Vienna Circle dispersed, mainly because of political upheaval and the deaths of Hahn and Schlick.

During the 1920s and the 1930s, Stalin fought and defeated the political influence of Leon Trotsky and of the Trotskyists in Russia, by means of slander, anti-Semitism, programmed censorship, expulsions, exile ( internal and external ), and imprisonment.

Hofmann was renowned not only as an artist but also as a teacher of art, and a modernist theorist both in his native Germany and later in the U. S. During the 1930s in New York and California he introduced modernism and modernist theories to a new generation of American artists.

During the 1930s, the illustrator Vernon Grant developed Snap, Crackle and Pop as gnome-like mascots for the Kellogg Company.

During the 1930s and 1940s, the state passed labor laws, implemented agrarian reform, and assumed a role in modernization, influenced in part by the leadership of Juan Domingo Perón in Argentina and Getúlio Dornelles Vargas in Brazil.

During the 1930s Belgian colonial authorities in Rwanda used phrenology to explain the so-called superiority of Tutsis over Hutus.

During the 1930s, the minotaur replaced the harlequin as a common motif in his work.

During the 1930s and 1940s, Heinlein was deeply interested in Alfred Korzybski's General Semantics and attended a number of seminars on the subject.

During this shift, enduring questions about the nature and production of knowledge came to occupy a central place in cultural and social anthropology.

During the 3rd millennium BC, there developed a very intimate cultural symbiosis between the Sumerians and the Akkadians, which included widespread bilingualism.

During the 3rd millennium BC, there developed a very intimate cultural symbiosis between the Sumerians and the Akkadians, which included widespread bilingualism.

During the third millennium BC, there developed a very intimate cultural symbiosis between the Sumerians and the Akkadians, which included widespread bilingualism.

During the Weimar era, Berlin became internationally renowned as a center of cultural transformation, at the heart of the Roaring Twenties.

During the course of 1915, Chaplin became a cultural phenomenon.

During his long professional career, Alston significantly enriched the cultural life of Harlem.

During the period of time known as the Dark Ages ( 5th – 15th century ), Arabic scholars and scientists progressed science and technology while Europe was in cultural decline and poverty.

During the social and cultural climate of the ancient Eastern Jin Dynasty ( 316-420 AD ) based at Nanjing in the south, painting became one of the official pastimes of Confucian-taught bureaucratic officials and aristocrats ( along with music played by the guqin zither, writing fanciful calligraphy, and writing and reciting of poetry ).

During this time, it has grown to become one of the most significant financial and cultural capitals of the world.

During that time a number of regional magnates, in particular Novgorod and Pskov, fought to inherit the cultural and political legacy of Kievan Rus '.

During the third millennium BCE, there developed a very intimate cultural symbiosis between the Sumerians and the Akkadians, which included widespread bilingualism.

During the 1920s, Kyrgyzstan saw considerable cultural, educational, and social change.

During the period of Bulgarian National Revival many Bulgarians from Vardar Macedonia supported the struggle for creation of Bulgarian cultural educational and religious institutions, including Bulgarian Exarchate.

During the third millennium BC, there developed a very intimate cultural symbiosis between the Sumerians and the Akkadians, which included widespread bilingualism.

During the Epipaleolithic and the Mesolithic, the presence of laminar or geometric microliths serves to date the deposits of different cultural traditions.

During the early 17th century, a curious cultural and literary cult of melancholia arose in England.

During his reign, Nero focused much of his attention on diplomacy, trade, and enhancing the cultural life of the Empire.

During World War II, the Vichy regime stripped him of some of these jobs and distinctions because of his quiet refusal to collaborate with Vichy and the German occupation, but Valéry continued, throughout these troubled years, to publish and to be active in French cultural life, especially as a member of the Académie française.

During his pontificate, Gregory fostered cultural patronages associated with his papacy.

During the fifth millennium BC migrations from the drying Sahara brought neolithic people into the Nile Valley along with agriculture, The population that resulted from this cultural and genetic mixing developed social hierarchy over the next centuries become the Kingdom of Kush ( with the capital at Kerma ) at 1700 BC Anthropological and archaeological research indicate that during the predynastic period Nubia and Nagadan Upper Egypt were ethnically, and culturally nearly identical, and thus, simultaneously evolved systems of pharaonic kingship by 3300 BC.

During the Neolithic period, human societies underwent major cultural and economic changes, including the development of agriculture, the formation of sedentary societies and fixed settlements, increasing population densities, and the use of pottery and more complex tools.

During this time, German cultural and ethnic influence increased as a result of immigration from German-speaking parts of the Holy Roman Empire.

During the Great Northern War, plague stricken Tallinn along with Swedish Estonia and Livonia capitulated to Imperial Russia in 1710, but the local self-government institutions ( Magistracy of Reval and Chivalry of Estonia ) retained their cultural and economical autonomy within Imperial Russia as the Duchy of Estonia.

During the second half of the 19th century, Tartu was the cultural center for Estonians in the era of Romantic nationalism.