Abstract art uses shapes, forms and gestures rather than attempting to depict visual reality. It emerged in the early 1900s and forms a central part of modern art. It often explores ideas like order, purity, simplicity and spirituality through non-representational forms. The documents profile several influential abstract sculptors like Brancusi, Moore, Gabo and Arp who pioneered geometric and biomorphic abstractions using materials like wood, stone and metal to reduce forms and reveal essential truths.