I’d like to quote from the book Paris in Our Time (Albert Skira, Paris: Editions d’Art,1957).

Nothing is more striking in the history of art—and indeed the history of culture in general—than the sudden breaks of continuity which take place when after a slow, sedate advance “from precedent to precedent” a more adventurous generation comes to the fore, eager for new worlds to conquer. In the case of art these bloodless revolutions are often the work of a quite small group of rebels or even a single man in whom the smoldering unrest of several generations bursts into flames.

The author was describing the transition from Realism to Impressionism around 140 years ago, when the artists of the day were freed from the constraints of their ...

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