The answer to your question would be Death.
The immediate cause for World War 1 was the assassination of the Archduke Franz Ferdinand of Austria and his pregnant wife Sophie. Archduke Franz Ferdinand of Austria was the nephew of Emperor Franz Josef and heir to the throne of Austria and Hungary.
In the late 1800s, workers organized unions to solve their problems. Their problems were low wages and unsafe working conditions. First, workers formed local unions in single factories. These unions used strikes to try to force employers to increase wages or make working conditions safer.
