In mid 20th century, the art world completely changed into a new way of expressing ideas. Many artists began to look for different ideas and styles. It started in the 1960s and 1970s, as many artists attempted to free art from the art marketsa system in which works of art become commodities to be bought and sold or held as a financial investment (Lucie-Smith 220). They wanted to create art that would be too short-lived to be sold. To them the beauty of their work is the process of it. This includes the Earthworks artists Robert Smithson, Michael Heizer, Walter De Maria, and Nancy Holt, not only they were interest in the process of making it, also intrigued by how the forces of nature could be incorporated in a work of art. As the technology become more advance; these artists chose to move their work outdoor. Instead of brushes or pencils, they used bulldozers and other machinery to move earth into giant sculptural forms(). They believed that everything on this world is a part of a process. According to philosopher Alfred North Whitehead, every real-life object may be understood as a similarly constructed series of events and processes (Donald, 852). They began to see the importance of forces of nature and the process of their work. Earthworks artists has been developed in many ways, such as the processing idea and social influences, the subject matter, and the style. These artists were influenced by the idea of process, when Whitehead introduces the notion of an actual occasion. According to his view, an actual occasion is not an enduring substance, but a process of becoming (Donald 852). This influenced the thinking of process, and the notion that sometime things falling apart are far more interesting than building it. As we see in Smithson's work Spiral Jetty (1970), which made a giant coil of earth, rock, and salt crystals extending outward from the shore of the Great Salt Lake in Utah. He left it vulnerable to the natural forces o...