Before the Second Punic War the eastern and southern coasts of what is now Spain were occupied by independent tribes referred to by Classical authors as the Iberians. Speakers of a non-Indo-European language (or languages), they had centuries of contact with Phoenician and Greek colonies. They also had wider contact with the Mediterranean world through their work as mercenaries, for which they won praise from authors such as Strabo and Thucydides. Evidence of social stratification and urbanization is stronger for the Iberians than it is for the other ethnic groups of of the Iberian Peninsula, save for the Tartessian remnant culture of the southwest region. Iron ore was abundant in the Ebro river basin and silver was produced in significant quantities in the region of what would become Carthago Nova. Native scripts are dated to at least the 4th century BCE, although most of what now survives consists of gravestone inscriptions.
Given these advantages, the Iberians seemed to have the best chance of all the peninsula's ethnic groups of becoming a significant Mediterranean power at least on a par with the great Gaulish confederations of the 1st century BCE, if not on the level of Rome or Carthage. But Carthaginian expansion into the peninsula during the later half of the 3rd century BCE, followed by Roman conquest during and following the Second Punic War put an end to the socio-political advancement and consolidation of the Iberians. How could this have been averted with a POD no earlier than 300 BCE? What material or cultural advances could they gain from their Greek and Phoenician that were not realized OTL? Which tribe has the best combination of wealth, social organization, and military potency to become a true kingdom capable of holding at bay Roman and Carthaginian expansion?
Given these advantages, the Iberians seemed to have the best chance of all the peninsula's ethnic groups of becoming a significant Mediterranean power at least on a par with the great Gaulish confederations of the 1st century BCE, if not on the level of Rome or Carthage. But Carthaginian expansion into the peninsula during the later half of the 3rd century BCE, followed by Roman conquest during and following the Second Punic War put an end to the socio-political advancement and consolidation of the Iberians. How could this have been averted with a POD no earlier than 300 BCE? What material or cultural advances could they gain from their Greek and Phoenician that were not realized OTL? Which tribe has the best combination of wealth, social organization, and military potency to become a true kingdom capable of holding at bay Roman and Carthaginian expansion?