What led to specialization and division of labor in mesopotamia?

Historians are concerned with the accuracy of their writings and readings but are also aware of the inability of authors to know every angle of every story biases, perspectives, beliefs, and a variety of other differences history being told by one person at a time no one being totally accurate, as hard as we try really need on this, and you^^

The internal combustion engine was an innovation of

How did the mexcian war of independence differ from the american revolution?