Gautama, also known as Śākyamuni or Shakyamuni ("sage of the Shakyas"), is the key figure in Buddhism, and accounts of his life, discourses, and monastic rules are believed by Buddhists to have been summarized after his death and memorized by his followers. Various collections of teachings attributed to Gautama were passed down by oral tradition, and first committed to writing about 400 years later. Early Western scholarship tended to accept the biography of the Buddha presented in the Buddhist scriptures as largely historical, but currently "scholars are increasingly reluctant to make unqualified claims about the historical facts of the Buddha's life and teachings." Source: Wikipedia

"All things appear and disappear because of the concurrence of causes and conditions. Nothing ever exists entirely alone; everything is in relation to everything else."  Source: Brainy Quote