Part I contributes to a richer understanding of the conceptual aspects and conditions of transnational solidarity. The first five chapters raise crucial questions. What is the history of the concept of solidarity? How can transnational solidarity be defined and understood? What are the symbols and myths of transnational solidarity? How can different solidarities co-exist and how do we chose between conflicting solidarities? Through philosophical, sociological, historical, political, anthropological, psychological and ancient Greek thought, we are drawn into an interdisciplinary universe with transnational solidarity at the heart.