Although I adore the Italian High Renaissance, I'd rather look at Mannerism. The former is ordered, integrated, otherworldly, and grandiose; it leaves you feeling hungry for something flawed and of-the-flesh.

The very paradigm of revolution, of right versus wrong, good versus bad, is a relic with no bearing on the present. Yet artists, exhibitions, and curators valorize the sixties. People who wrote about these artists 30 years ago still write about them in the same ways, often for the same magazines.

There are many, many art worlds. Art contains multitudes.

Pictures artists staged their own images or copied or cut out others already in existence. The viewer took them in separately, in sometimes paradoxical waves: an original image, then the manipulations of it, then the places where image and idea intersected. This created a crucial perceptual glitch that irony and understanding filled.

When the purse strings tighten up at museums, the institutions usually cut back and cancel shows. That's exactly the wrong reaction. In fact, now is a good time for them to loosen up - a chance to breathe and experiment a little - and go for the juicy solution lurking in their own basements.

After 1909, Monet drastically enlarged his brushstrokes, disintegrated his images, and broke through the taming constraints and delicacy of Impressionism for good. Nineteen gnarly paintings, starting in 1909 and carrying through his final seventeen years, finish off the notion that Monet went happily ever after into lily-land.

I know it's dangerous to take on bloggers. They can go after you every day, all day long, and anonymous people can chime in, too.