World war I

Before 1914 the five Great Powers, Great Britain, France, Germany, Austria-Hungary and Russia controlled Europe. In 1914 World War One broke out in Europe. Historians have debated the causes ever since. As a historian it will be difficult to conclusively establish a single cause - a number of significant causes is a far more helpful outcome. Although the European Alliances were certainly a cause of WWI, there were many other causes as well. Along with the European Alliances there was Nationalism, Imperi...