The world history defines the history of mankind as decided by the study of archaeological and inscribed archives. The recorded ancient history starts when writing was invented. Prehistory is marked by the Early Stone Age or the Palaeolithic Era which was followed by New Stone Age or Neolithic Era. The Agricultural Revolution was from 8000 and 5000 BCE; it was during this time that the humans progressed and started farming and animal husbandry and settled down to form villages and then civilizations. Expansion of these villages required one to travel and travelling from one place to the other lead to development of transport.