Civil wars are generally more savage, and bear more lasting consequences, than wars between countries. Many more people died in the American Civil War—at a time when the population was a tenth of what it is today—than in any other American conflict, and its long-term effects probably surpass those of the others. Major bloodlettings of the 20th century—hundreds of thousands to millions of deaths—occurred in civil wars such as the Russian Civil War, the Chinese Civil Wars of 1927-37 and 1945-49, and the Spanish Civil War. More Russian lives were lost in the Russian Civil War that followed World War I than in the Great War itself, for instance.