Cubism the 1950s and 1960s, especially by Clement Greenberg. Contemporary views of Cubism are complex, formed to some extent in response to the "Salle 41" Cubists, whose methods were too distinct from those of Picasso and Braque to be considered merely secondary to them. Alternative interpretations of Cubism have therefore developed. Wider views of Cubism include artists who were later associated with the "Salle 41" artists, e.g., Francis Picabia; the brothers Jacques Villon, Raymond Duchamp-Villon and Marcel Duchamp, who beginning in late 1911 formed the core of the Section d'Or (or the Puteaux Group); the sculptors Alexander Archipenko, Joseph Csaky and
Western use of the swastika in the early 20th century specifically Indo-European symbol, and associated it with the ancient migrations of Proto-Indo-Europeans. He connected it with similar shapes found on ancient pots in Germany, and theorised that the swastika square was a "significant religious symbol of our remote ancestors", linking Germanic, Greek and Indo-Iranian cultures. Later discoveries of the motif among the remains of the Hittites and of ancient Iran seemed to confirm this theory, but the symbol was also known for its use by indigenous American Indians as well as Eastern cultures. By the early 20th century it was used worldwide and was regarded as a symbol of good