The development of cubism can be attributed to two men, Pablo Picasso and George Braque.
By 1907, a collaboration between the twp artists was beginning. They worked side by side, both experimenting with a system which sought to totally flatten space.
One of the primary goals of cubism was to depart from the traditional understanding of perspective and spacial cues.
Their early experiments with the style uses extremely bright colors, hard edged forms, and flattened space.
Though previous art movements (Impressionism and Post Impressionism) began to evolve into flatter forms, Picasso and Braque were more radical in their approach.
Les Demoiselles de Avignon (1907)
This was one of Picasso's earliest works, which broke dramatically from his figurative and poetic works of the first part of his life.
After 1909, Picasso and Braque began a more systematic study of structure which we know as "Analytical Cubism".
In this period, they removed bright colors from their compositions, favoring monochromatic earth tones so that they could focus primarily on the structure. The paintings of this period look as if they have deconstructed objects and rearranged them on the canvas. One goal of this is to depict different viewpoints simultaneously.
The Mandolin (1910)
In his later life Picasso began to introduce more color and pattern into his cubist works than he did in experimental earlier period. Some examples include:
Girl Before a Mirror (1932)
Nude in a rocking chair (1956)