Dadaism.

To elaborate, I quote the following paragraph from Wikipedia.

“The basis of Dada is nonsense. With the order of the world destroyed by World War I, Dada was a way to express the confusion that was felt by many people as their world was turned upside down. There is not an attempt to find meaning in disorder, but rather to accept disorder as the nature of the world. Many embraced this disorder through Dada, using it as a means to express their distaste for the aesthetics of the previous order and carnage it reaped. Through this rejection of traditional culture and aesthetics they hoped to reach a personal understanding of the true nature of the world around them.”