This is a journey to the roots of the modern world: from the eclectic Germanic tribes that defied the mighty Romans, to the seafaring Carthaginians that established the first global trade network, and the pioneering Arabs and their advances into modern science. Meet the ancestors that have shaped the world. The Carthaginians were sly merchants and cruel child killers - at least according to the Ancient Romans and Greeks. But research shows that they weren't as bad as their reputation. Their story began around 3000 years ago, when settlers left their homes in what is now Lebanon to set up colonies around the Mediterranean. The most powerful was Carthage, a bustling metropolis in what is now Tunisia, with a port that was the envy of the entire world.