Linked from
The 42 pages that link to Iron Age, each with the reason it gives.
AlloyRelated: The adoption of iron and its alloys transformed toolmaking and societies.
MetalRelated: Ironworking broadened access to durable metal after earlier reliance on copper alloys.
SmeltingRelated: Iron smelting enabled the broad adoption of iron tools and weapons.
Tool (implement)Related: Ironworking made strong metal tools more broadly available.
Kitchen knifeRelated: Iron and later steel expanded the possibilities for working blades.
PickaxeRelated: Iron allowed hard, repairable pick heads to become common in digging and mining.