Responding to the major society shifts, aftermaths of wars, and technological innovations, 20th century design movements were defined by upheavals. Art, design, theater and performances were all affected by the changes happening in the world. Painters, sculptors, and designers used their skills to document such events and to implement new aesthetic ideas and styles which began to treat form, material, and technology in a completely new way. As recorders of time, 20th century design movements responded to the machine age of the 1920s society and started to produce design pieces influenced by the invention of mass-produced materials. After the wars, the need for a more humanist approach to the world influenced the embrace of natural materials and handmade objects. It became visible, very early on, that design was not only beautiful pieces decorating the homes but an important archive for the understanding of the time and its changes.