Abstractionism emerged in the early 20th century as an artistic movement focused on non-representational forms and the communication of meaning without obvious subject matter. It was preceded by movements like Fauvism and Cubism and emphasized simplification through color, line, and shape rather than realistic forms. Abstractionism influenced later developments in art including Suprematism, De Stijl/Neoplasticism, and Constructivism. Pioneering abstractionist artists discussed include Kandinsky, Mondrian, Malevich, and O'Keeffe, whose non-objective geometrical and nature-inspired works pushed the boundaries of visual representation. While controversial initially, abstractionism went on to have a significant impact