However, as a result of their broad definitions, the Big Five personality traits are not nearly as powerful in predicting and explaining actual behavior as are the more numerous lower-level, specific traits.
The history of socialism has its origins in the French Revolution of 1789 and the changes brought about by the Industrial Revolution, although it has precedents in earlier movements and ideas.
When World War I began in 1914, many European socialist leaders supported their respective governments' war aims. The social democratic parties in the UK, France, Belgium and Germany supported their respective state's wartime military and economic planning, discarding their commitment to internationalism and solidarity.