What caused the synthetic cubism?

Synthetic Cubism is a 20th century artistic style developed by the avant garde movement (artists who went against the traditional artistic styles). This cubism was developed by Pablo Picasso, Braque, and Gris. Basically, it is very similar to a college. Synthetic Cubism combines different textures, surfaces, and subject matters into one painting. It has a less planar shifts and is mostly very 2-D. A great example is Pablo Picasso's painting: The Three Musicians. As a result, many artists explored line, shape, form, and color.