section_path: 19th century/Late 19th century
section_name: Late 19th century
paragraph_text: Late 19th century
  
  Following the Napoleonic Wars, the British Empire became the world's leading power, controlling one-quarter of the world's population and one-third of the land area. It enforced a Pax Britannica, encouraged trade, and battled rampant piracy.
  
  Slavery was greatly reduced around the world. Following a successful slave revolt in Haiti, Britain forced the Barbary pirates to halt their practice of kidnapping and enslaving Europeans, banned slavery throughout its domain in 1833, and charged its navy with ending the global slave trade. Slavery was then abolished in Russia in 1861, by the Emancipation Proclamation in the United States in 1863, and in Brazil in 1888. (see Abolitionism).
  
  Following the abolition of the slave trade, and propelled by economic exploitation, the Scramble for Africa was initiated formally at the Berlin West Africa Conference in 1884–1885. All the major European powers laid claim to the areas of Africa where they could exhibit a sphere of influence over the area. These claims did not have to have any substantial land holdings or treaties to be legitimate. The French gained major ground in West Africa, the British in East Africa, and the Portuguese and Spanish at various points throughout the continent, while Leopold II of Belgium was able to retain his personal fiefdom, Congo.
  
  Electricity, steel, and petroleum fuelled a Second Industrial Revolution which enabled Germany, Japan, and the United States to become great powers that raced to create empires of their own. However, Russia and China failed to keep pace with the other world powers, which led to massive social unrest in both empires.