Identify specific individual movements within modernism and postmodernism and discuss artworks from those movements in terms of content, style and techniques.

Sure, here are some specific movements within modernism and postmodernism, along with examples of artworks from those movements and a discussion of their content, style, and techniques:

1. Cubism (Modernism): Cubism was an art movement that originated in France in the early 20th century, characterized by fragmented, geometric forms and multiple viewpoints. One of the most famous Cubist artworks is Pablo Picasso's Les Demoiselles d'Avignon (1907), which features five nude women rendered in a highly abstracted, angular style. The painting's content is highly controversial, depicting the women in a confrontational and disorienting manner that challenges traditional notions of beauty and representation. The style of Cubism is characterized by its fragmentation of forms, multiple perspectives, and geometric abstraction. Techniques used by Cubist artists included the use of collage, as well as the manipulation of form and space through color and texture.

2. Abstract Expressionism (Modernism): Abstract Expressionism was a movement that emerged in the United States in the 1940s, characterized by large-scale, gestural paintings that emphasized the physical act of painting. One famous Abstract Expressionist work is Jackson Pollock's Number 1, 1950 (Lavender Mist), which features a sprawling, swirling web of paint that appears to have been flung across the canvas. The content of Abstract Expressionist works is often highly abstract, with little or no recognizable subject matter. The style is characterized by its emphasis on gesture and the physicality of paint, as well as its use of color and texture to create a sense of energy and movement. Techniques used by Abstract Expressionist artists included dripping, splattering, and pouring paint onto the canvas.

3. Pop Art (Postmodernism): Pop Art was a movement that emerged in Britain and the United States in the 1950s and 60s, characterized by the use of mass-produced imagery from popular culture. One famous Pop Art work is Andy Warhol's Campbell's Soup Cans (1962), which features a series of 32 canvases, each depicting a different flavor of Campbell's soup. The content of Pop Art works is often highly recognizable and familiar, drawn from the world of advertising, consumer goods, and popular media. The style is characterized by its use of bright colors, bold outlines, and the repetition of imagery. Techniques used by Pop Art artists included silkscreen printing, as well as the appropriation and transformation of existing images.

4. Postmodern Appropriation (Postmodernism): Postmodern appropriation is a movement that emerged in the 1980s and 90s, characterized by the use of appropriation, or the borrowing and re-contextualization of existing images and objects. One famous Postmodern appropriation work is Sherrie Levine's Untitled (After Walker Evans) (1981), which features a series of photographs of photographs by the photographer Walker Evans, reproduced and presented as Levine's own work. The content of Postmodern appropriation works is often highly self-referential, drawing attention to the act of appropriation itself and the role of authorship in art. The style is characterized by its use of existing images and objects, often presented with little or no alteration, and the creation of new meanings and associations through their re-contextualization. Techniques used by Postmodern appropriation artists included photography, sculpture, and installation art.

Overall, these movements within modernism and postmodernism demonstrate the diversity and complexity of 20th-century art, each with its own distinctive content, style, and techniques.