The area of the pre- Dvaravati states was favoured by a rich variety of natural resources; it had plenty of fertile, arable land, a network of waterways, and except for an occasional flood, an absence of disasters produced by earthquakes, volcanoes, typhoons. Each settlement must have been quite self-sufficient, and, by and large, on peaceful terms with its neighbours judging by the rarity of weapons found in prehistoric and proto-historic graves. Their lack is a striking contrast to the numerous deposits of spears, daggers, lance heads, etc. found in Late Chou and Han Chinese tombs.