Answer:
The real and main reason was The Assassination of Archduke Francisco Ferdinand heir to the throne of Austria-Hungary in his visit in Bosnia. The Hero Gavrilo Princep killed him because he want his country to have independence.
There are also reasons like Imperialism, Nationalism, Militarism and many otherd
Global trade was established with america, and capitalism grew
The correct answer is " Citizens would be able to form governments that ensure their interests."
The idea of a social contract involves citizens of a country giving up some of their individual liberties (aka freedoms) so that the government can make society safer. Hobbes argued that this social contract, despite the fact that it limits individual freedoms, will benefit citizens because they have the opportunity to pick their leaders who will make laws based around their wants/needs.