Why would writers choose to produce works in the vernacular instead of in latin?

Draw conclusions  why might a cause like italian unification successfully draw people of very different backgrounds together?  

Text: dante's inferno canto iv analyze the setting that dante develops in canto iv. examine how 1) the choices he makes to describe the setting and 2) the characters he places in this setting affect the reader's understanding of the first circle of hell, limbo. be sure to use specific details from the text to support your ideas

What was the underlying cause of the cold war?