A New York Times article addresses the role that social media played in rapidly bringing the events in Ferguson to national attention.
Georg Ferdinand Duckwitz', a German diplomat stationed in the capital of Copenhagen, alerted both the Jewish community and the Danish underground of the coming roundup. As a result, most of the Danish Jews went into hiding and were transported to Sweden, where they were cared for thanks to Duckwitz’s diplomacy.
Chiune (Sempo) Sugihara, a Japanese diplomat stationed in the Lithuanian prewar capital of Kaunas (Kovno) in the summer of 1940. In defiance of his superiors, Sugihara decided to provide transit visas to thousands of Jews who had escaped German persecution in Poland. Many of them used this opportunity to flee Europe into safety.