The document discusses the emergence of independent countries and nation-states in the 19th century. It defines key terms like state, nation, and nation-state. It also outlines some of the common characteristics of independent countries like having defined territory, population, economy, government and sovereignty. The document then discusses the rise of nationalism and population growth in Europe in the late 18th century. It also summarizes some of the major revolutionary movements and events that helped shape nation-states like the French Revolution, Congress of Vienna, revolutions of the 1820s-1830s, 1848, Italian and German unification in the late 19th century.