This document discusses how social structures can influence and be influenced by nationalism. It examines how factors like social class, religion, language, and region can reinforce each other and overlap to shape national identities. Specific examples are given of how in various countries and time periods, these overlapping social characteristics coincided and divided along national lines. The document also explores how regional identities and notions of internal colonialism can provide a basis for nationalism in geographically peripheral areas experiencing economic exploitation.