Socio-linguistics studies language in social systems and must consider concepts like salience, agenda, intent, allusion, symbolism, and collective unconscious. Symbolism results when allusions become so important that they can seriously affect behavior. Many important symbols can be found in religion, politics, flags, names, and colors. The collective unconscious refers to symbols that cross generations, coined by Carl Jung. The document then provides numerous examples of symbolic shapes, flags, names, and colors in politics, religion, literature, and popular culture to illustrate socio-linguistic concepts.