End of Futurism

When Italy entered World War 1 in 1915 many futurists enroled, meaning the slow death of the Futurist movement.
Another major contribution to the Futurist movement ending was the death of the machine age, meaning artists lost flair and inspiration for their work. Also, the hanging of fellow artist Mussolini in 1945 brought the futurists a political conclusion.
However the nail on the head for this controversial movement was the death of Marinetti himself in 1945. Futurism had died in Italy.