<span>Debacle is a sudden and violent collapse. The "debacle in Russia" refers to the Russian Revolution of 1917. Thus the time period of the story is the five or six years between 1917 or 1918 and 1923, a time at which Russian Communism reduced the privileged life of the noble to a level at or near the life of the Russian proletariat.</span>
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Species interactions within ecological webs include four main types of two-way interactions: mutualism, commensalism, competition, and predation (which includes herbivory and parasitism). Because of the many linkages among species within a food web, changes to one species can have far-reaching effects.
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encyclopedia.ushmm.org/content/en/article/nazi-propaganda
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