Piracy in the ancient Mediterranean has a long documented history, from the Late Bronze Age. According to the classical historian Janice Gabbert "The eastern Mediterranean has been plagued by piracy since the first dawn of history." Though its prehistory is ambiguously differentiated from trade, this period in history marked the earliest documented wave of piracy.
The roots of the word "piracy" come from the ancient Greek πειράομαι, or peiráomai, meaning "attempt;" i.e., an attempt to rob for personal gain. This morphed into πειρατής, or peiratēs, meaning "brigand," and from that to the Latin pirata, where we get the modern English word pirate. However, they were frequently referred to by ancient Greeks as "leistes", the same word use for land-based thieves.
A number of geographic and economic characteristics of the classical world produced an environment that encouraged piracy. First of all, "The coasts of the Mediterranean are particularly favourable to the development of piracy." The barren, rocky shoreline was not suitable for large scale agriculture and could not support a large population. Therefore, most villages were small and of humble means. Being coastal villages, the primary method of support came from fishing, so most of the able-bodied men had boats, seafaring skills, and navigational knowledge. When fishing wasn’t enough, many men turned to highway robbery and raids of nearby territories to support themselves. However, land trade routes were few and far between, given mountainous obstacles and few rivers. Therefore, most nations deemed "the principal lines of communication should be by sea, and the bulk of commerce should be carried by the same routes."
In the early days of maritime navigation, most trade vessels hugged the coasts. "Traffic was restricted to fixed lanes in a way impossible on the open ocean." The naukleroi, or ship-owning merchantmen, moved slowly along established trade routes with their heavy burdens weighing them down. Imagine a fisherman-raider seeing treasure-laden trade ships passing the shores he knows like no one else, day after day. With the motivation and the means to do so, it wasn’t hard for coastal natives to apply themselves to sea-robbery. They brought a thief's mindset to the sea and simply changing their method of thievery. "The pirate was the robber of the sea highways: and the highways of the Mediterranean were well-defined and well-traveled."
The rocky coast that had been unsuitable for agriculture was perfectly suited to piracy, outfitted with hidden inlets that allowed quick access points to trade routes. "Pirate enclaves grew up along rocky shores that provided shelter and kept them hidden from view until it was too late for their victims to escape."