What art movement did Norman Rockwell take place in?

Norman Rockwell is a very famous painter of humorous American life. The media he worked with was oil paints; it was amazing the detail he could paint with this inarticulate media. His works show vignettes of American life during the early to mid-twentieth century. He illustrated The Saturday Evening Post for 47 consecutive years, painting a classic American scene every week.

His self-portrait is nearly a caricature, showing him looking into a mirror over his canvas, with a pipe in his mouth, and I think a dog lying at his feet.

Another famous painting shows a group of boys racing to the lake in the woods, stripping their clothes and shoes as they run, dog racing alongside excitedly, the sign in the background, "No swimming." Every painting is filled with details that increase the humor of the scene.