Which factor contributed most to the beginning of World War I?

Dissatisfaction of Central Powers with the colonial division.

Explanation:

The struggle for colonies between the two enemy blocs,  the Central Powers and the Entente was the cause of the war. Central Powers sought to reach the colonies. This conflict, the largest so far, has been called the First World War. When it comes to the Balkans, Germany and Austria-Hungary seek to use it to penetrate the Near and Middle East.

Assemblies do not have written codes of laws. laws are matters for magistrates and courts, not assemblies. codes of law are things such as civil law, criminal law, and constitutional law. what assemblies have are procedures regarding debating, voting and other business they might carry out.  also note that rome had three assemblies: the assembly of the soldiers, the assembly of the tribes, and the plebeian councils.