Who’s to blame for big problems like racism, factory farming, or climate change? Isn’t it time we held governments and corporations accountable? Or would that just let individuals off the hook? This week we’re talking about collective responsibility.

Christopher Nolan's Dunkirk portrays ordinary people acting under tremendous fear. Some are glorious, some are mean-spirited, some are anxious, and many are patient. But the lesson to be drawn from this movie is that it is not particular individuals alone but practical solidarity that matters “to outlive the menace of tyranny,” in Winston Churchill’s words.