What were the two great power shifts in modern history?

The two significant power shifts in modern history were the rise of the United States and the decline of European colonial empires after World War II. The U.S. emerged as a global superpower following the war, significantly influencing international politics and economics. Simultaneously, decolonization led to the independence of numerous nations in Africa, Asia, and the Caribbean, altering geopolitical dynamics and diminishing European dominance. These changes reshaped global alliances and power structures, setting the stage for contemporary international relations.