Why was impressionism created?

The colors used as well as the subject are often very pleasing to the viewer. For the first time in history , @1860-1930's, artist's had every color in nature and the "spectrum of Light" to easily capture life and fleeting beauty. Art clubs in France and the States were the first to promote "pleine aire" outings in which artists such as Monet, Degas, Van Gogh, J.S. Sargeant, etc produced a large number of masterpieces , rich in color and subject.