Russian forces fully occupied the eastern Ukrainian city of Sievierodonetsk on Saturday, both sides said, confirming Kyiv's biggest battlefield setback for more than a month following weeks of some of the war's bloodiest fighting. Ukraine called its retreat from the city a "tactical withdrawal" to fight from higher ground in Lysychansk on the opposite bank of the Siverskyi Donets river. Pro-Russian separatists said Moscow's forces were now attacking Lysychansk. The fall of Sievierodonetsk - once home to more than 100,000 people but now a wasteland - was Russia's biggest victory since capturing the port of Mariupol last month. It transforms…

On December 1, 1955, in Montgomery, Alabama, a 42-year-old woman named Rosa Parks did what philosophers call against method. Paul Feyeraband, an Austrian philosopher, had in 1976 pioneered that thesis. In a racial American society of the time where blacks were inferior and were expected to leave their bus seats for whites, Parks refused to give up hers for a white male passenger. Her refusal sparked off a boycott that changed the paradigm of racial relationship in America. It even shot the less-known Martin Luther King Jr. to world recognition. At the risk of sanctions for her impudence, Parks had…