Dadaism, an avant-garde movement that emerged during World War I, was characterized by its anti-art stance and its use of satire, collage, and performance art to critique the political and social conventions of the time.

During World War I, governments on both sides commissioned artists to create propaganda posters, films, and other forms of media to boost morale, demonize the enemy, and influence public opinion.

Picasso's 'Guernica' (1937) is a large mural-sized painting that depicts the devastation caused by the bombing of the Basque town of Guernica during the Spanish Civil War. The painting became an iconic symbol of the anti-war movement.

Art censorship refers to the practice of suppressing or restricting artistic expression, often due to political, religious, or moral reasons. Censorship can take various forms, including banning, confiscating, or altering artworks.

Ai Weiwei is a contemporary Chinese artist and activist known for his provocative works that address issues of political oppression, human rights, and social justice. His art often involves performance art, installations, and sculptures.

The 'Culture Wars' in the United States involved debates over artistic freedom, government funding for the arts, and the role of moral values in art. These debates often centered around controversial artworks that challenged traditional norms and values.

Propaganda art is art that is created with the intention of promoting a particular political ideology or agenda. It is often used by governments or political parties to influence public opinion and shape political narratives.

Social Realism is an artistic movement that emerged in the early 20th century, characterized by its focus on depicting the lives and struggles of the working class and marginalized communities. Social Realist art often serves as a form of resistance against social injustice and political oppression.

Andy Warhol, a leading figure in the Pop Art movement, used mass-produced imagery and advertising techniques to critique consumerism and the commodification of art. His works often featured iconic products and celebrities, blurring the lines between art and commerce.

Ai Weiwei's installation 'Remembering' (1995) featured thousands of backpacks hanging from the ceiling, each representing a life lost in the Tiananmen Square Massacre. The work became a powerful symbol of the pro-democracy movement and a reminder of the government's violent crackdown.

Allegory, symbolism, and metaphor are all artistic techniques that can be used to convey political messages or ideas. Allegory uses symbols and metaphors to represent abstract ideas or concepts, while symbolism uses symbols to represent something else, often with a deeper meaning.

The Guerrilla Girls are a group of anonymous feminist artists who use street art, performance art, and political posters to raise awareness about gender inequality and discrimination in the art world and beyond.

Realism, an artistic movement that emerged in the mid-19th century, is characterized by its focus on depicting everyday life and social realities in a realistic and objective manner. Realist artists often used their work to address social and political issues, such as poverty, injustice, and social unrest.

Aestheticism, an artistic movement of the late 19th century, emphasized the importance of art for its own sake, rather than for its moral or didactic value. Aestheticism promoted the idea that art should be judged solely on its aesthetic qualities, without regard to its subject matter or moral implications.

Collage, assemblage, and readymade are all artistic techniques that involve the use of found objects or everyday materials to create works of art. Collage involves combining different materials and images on a single surface, while assemblage involves constructing three-dimensional works of art from found objects. Readymade is a term used to describe an artwork that is created by simply presenting a found object as art.