What makes a ‘crisis’?

In his picture from 1932, ‘Derrière la gare Saint-Lazare’, Henri Cartier-Bresson caught the moment when a man in a hat launched himself forward from a ladder lying in some water, his leading heel not yet breaking the mirror-like surface, which reflected too a circus poster of a girl leaping. In 1952, when the photographer published his collection Images à la Sauvette, the title chosen for the English edition was The Decisive Moment, a phrase that Cartier-Bresson took from a sentence from Cardinal de Retz (1613-79), a statesman from a banking family: ‘Il n’y a rien dans ce monde qui n’ait...