In my research, I have developed cross-cultural, interdisciplinary methodologies that employ not only all forms of ancient source, particularly archaeology (often the only form of contemporary evidence), but also a robust arsenal of theoretical tools to interpret this highly varied source base. Putting this into the context of my research, I have been able to expand the narrow story we have traditionally told about the ancient Greeks. This has been achieved by addressing their overlooked mobilities and migrations prior to the conquests of Alexander the Great. Greek migrants founded cities that stretched from Catalonia to Ukraine and resulted in, literally, the other half of ancient Greece’s population. The horizons of the Greek world expanded both spatially and culturally, as migrants resided next to many different non-Greek peoples. Answering why this other half of ancient Greece has been given short shrift in modern historical accounts has also required considering historiography, to address the role of such factors as nationalism and Eurocentrism in suppressing narratives.