In spite of its difficulty, the study of orally transmitted traditions, such as sung epics, provides fascinating insight into a society’s culture. On the island of Palawan and among the Buryats living in the forests of Siberia, epics mostly dealt with the quest for marriage partners, acts of heroism and the overcoming of conflicts which led to social harmony and cohesion. In both these cultures, which were based on hunting and the exchange of goods, the epics were sung by shaman-bards.

In certain areas of Central Asia, petroglyphs provide almost the only source of information on prehistoric routes of communication and the diffusion and migration of prehistoric populations. They have revealed that already in the 3rd millennium BC, there were contacts between Central Asia and the Himalayan region. The routes that were used by ancient populations are very similar to the ones that would later become the Silk Roads.