The collective work sums up some of the results of the completed century, which will go down in history both by its enormous achievements and successes, as well as tragedies and contradictions. The work highlights the clash of democracy and totalitarianism, the impact on the fate of mankind of the two world wars, the role of socio-political changes, a place in the history of the 20th century. religious factor, as well as other features of this turbulent century. A special section is devoted to the development of the main regions of the world - Europe, the East, Africa and Latin America; The results of the century for Russia and the USA are considered separately. For historians, political scientists and a wide range of readers.