The fourth millennium BCE saw the Iberomaurisian culture spread extensively on the southern shores of the Hasirean peninsula, indicative of certain key myths of the Hasir. Archaeologists credit this to the increasingly widespread use of the sail as well as small embarkations that were made of plank hull which allowed ships to travel along the shore of the peninsula with greater ease.

This phenomena would additionally allow the Hasir to trade and interact with far greater ease the differing culture groups of the peninsula, particularly with peoples to the north-west. These peoples in particular, as they would prove extremely useful in allowing the Hasir to develop bronze, utilising the extensive copper deposits in southern Hasirea combined with tin from the north-west to create a new metal.

The practical use of the metal was far from elaborate - but the metal was nevertheless finding its place in Hasir culture to distinguish social classes. Especially alongside other types of jewellery made of gold, with the possession of such items beginning to symbolise a social class that had the connections and power to own the mines and the trade-boats.

In any case, the fourth millennium also saw the small tribal holdings made of mud and straw transition to structures made with stone. Masonry, especially in the larger kaiś-ke such as the Olśkuan or the Seloniŕ.

• Sail - Maritime -> raft, cloth/fabric/textile researched.

• Plank hull - Maritime -> wooden plank, raft/dugout canoe researched.

• Masonry - Industrial -> kiln, stone-working researched.

• Bronze - Industrial -> kiln, metalworking researched. access to both tin and copper (Focus: Metalworkers)

• Jewellery - Culture -> access to precious metals and metalworking researched. ( 1 Cultural technology)