What topic is often as a theme for studying world history since world war 1?

One prevalent theme in world history since World War I is the impact of conflict on global dynamics, particularly the interplay between war, peace, and international relations. This includes the rise and fall of empires, the emergence of new nations, and the evolution of ideologies such as nationalism, communism, and democracy. Additionally, themes of economic change, technological advancement, and social movements have been significant in shaping the post-war world. The effects of decolonization and the ongoing struggle for civil rights also serve as critical focal points in understanding contemporary global history.