It might be very difficult to establish the exact impact of Art as a driving force for change in 20th century.
It could be argued that Art is much more a reactive process than a proactive one. If it is true that "Art imitates life", then the answer must be "not at all".
If, as Brecht claims, "Art is not a mirror held up to reality, but a hammer with which to shape it." then maybe art could be seen as having some seriously active function in the process of change. However, that change must already have been afoot for the artist to have crafted it into art.
Changes in Art seem to follow on from other changes in culture, for example in technology, philosophy and politics. My own personal opinion is that art "captures the zeitgeist", or spirit of the age, working to crystalise our perceptions of the changes which are already being made, rather than taking the proactive role that the original question assumes:
Neitzche's Philosophies drive early 20th Century Expressionism; The Russian Revolution begets Socialist Realism; WWI throws us Surrealism; Mass Media gives us Pop Art. Though complete and exclusive causality in these examples is not possible to prove, the social change always predates the artistic change.
There is a process going on in which the artists are influenced by their environment, and express their experiences as art forms, which in turn influence the environment. Even if the impact of Art on 20th century society is possible to measure, I believe that influences of art are negligible in comparison to the effects of other influences such as politics, technology and science
Futurism started in Italy in the early 20th century.
What was the era in 1912?
1868 was in the 19th century.
Modernism
It can be all of them. Traditional folk music is usually singers and instrumentalists and generally has an unknown composer, but 20th century folk music is very similar, except we know of the composers.
Slavery and the cultural factors are critical to understanding the 20th century art.
Traditional African art had had the greatest influence on 20th century sculpture and painting.
i banged your mom
abstraction
In The 20th Century
In the 20th century.
N0. She lived during the 20th century and was a contemporary artist. The Renaissance lasted from the 14th to the 17th century.
Alexander Calder
1890-Early 20th century.
LAMARTINE
Picasso
Modern art (Modernism) is a term applied to most of the art of the 20th century, to distinguish it from art of earlier periods. Art created in this century is actually Post-Modern.