The period from 1870 to 1919 was marked by significant shifts in global power dynamics, driven by imperialism, industrialization, and geopolitical rivalries. 1. Imperialism and ExpansionEuropean powers, such as Britain, France, and Germany, aggressively expanded their empires, particularly in Africa and Asia. This era is often referred to as "New Imperialism."The British Empire became the largest in history, controlling about 25% of the world's population at its peak.Colonization was motivated by economic interests (access to resources and markets), political competition, and cultural ideologies like the "civilizing mission".2. Emergence of New PowersThe United States and Japan rose as significant global players during this period.The U.S. expanded its influence through the Spanish-American War (1898), gaining territories like the Philippines and Puerto Rico.Japan's victory in the Russo-Japanese War (1904-1905) established it as a dominant power in East Asia.3. Geopolitical RivalriesThe "Scramble for Africa" saw European nations dividing the continent among themselves, leading to tensions and conflicts.Alliances like the Triple Entente (France, Russia, Britain) and the Triple Alliance (Germany, Austria-Hungary, Italy) formed, setting the stage for World War I.4. World War I (1914-1918)The war was a culmination of imperial rivalries, militarism, and alliances.It marked the decline of old empires like Austria-Hungary and the Ottoman Empire and the rise of the U.S. as a global power.This period reshaped the global order, with lasting impacts on international relations and the balance of power.