Who can be a citizen? Many countries recognize birthright citizenship, meaning that anyone born within a country's territory is automatically a citizen, even if the parents are not citizens. See full-sized image for analysis.
Sociologist Nechama Tec explores the story of one woman, Stefa Dworek - a Polish Christian - and her motivation to shelter a Jewish woman during the Holocaust. If caught rescuing a Jew during this time, Stefa would have faced imprisonment or worse. Yet about 2 percent of the Polish Christian population chose to hide Jews in a nation known for its long history of antisemitism.
At the Congress of Berlin in 1884, 15 European powers divided Africa among them. By 1914, these imperial powers had fully colonized the continent, exploiting its people and resources. See full-sized image for analysis.
La Primera Guerra Mundial precipitó el derrumbe de muchos imperios, mientras que otros mantuvieron su poder global. Compare este mapa de la década de los veinte con el mapa de los imperios en 1914. Vea la imagen en tamaño completo para el análisis.