The spread of the alphabet from Phoenicia through Greece to Rome and thence to the modern world is one of the most important transmission events in intellectual history. But the spread was not simply copying — each adaptation was a creative act that improved the system for its new linguistic context.

The Phoenician alphabet was an abjad — it represented consonants only. This worked well for Semitic languages where the consonantal root carries the core meaning and vowels are largely predictable from context. When Greeks adopted the Phoenician script in the 9th-8th centuries BC, they repurposed letters representing sounds absent in Greek (certain Semitic consonants) to represent vowel sounds. This created the first true alphabet — a system representing both consonants and vowels.

The Greek alphabet then proliferated in multiple regional variants before a standard Ionic script was adopted as pan-Hellenic in the 5th-4th centuries BC. The Western Greek variants — used in Magna Graecia, the Greek colonies in southern Italy — were the ones adopted by the Etruscans and then by the Romans. Latin is therefore written in a Western Greek variant mediated through Etruscan, while modern Greek descends from Eastern Greek.

The Cyrillic alphabet, invented by Byzantine missionaries for Slavic languages in the 9th century AD, is also ultimately Greek-derived. The story of alphabetic transmission is a story about how technological innovations in information storage jump cultural boundaries and transform each new culture that adopts them.