Swiss psychologist Carl Jung was deeply influenced by the I Ching (Book of Changes), an ancient Chinese text that dates back to the Bronze Age Shang Dynasty (c. 1700–1050 BCE). It uses a system of Yin and Yang, which it places into hexagrams for the purposes of divination. Carl Jung's idea of synchronicity moves towards an Oriental view of causality, as he states in the foreword to Richard Wilhelm's translation of the I Ching. He explains that this Chinese view of the world is based not on science as the West knows it, but on chance.