Ow did Parthian kingship evolve, and is its development a reflection of a growing national identity?

Please compose an essay of not more than between 2500 and 3000 words (excluding bibliography) on the following.

Title: How did Parthian kingship evolve, and is its development a reflection of a growing national identity?

2 Related documents will be uploaded and it must be used in the essay also 2 more scholarly sources should be used

Added on 26.01.2015 11:23
Please write the essay based on these 2 documents and 2 more scholarly sources.

Thank you.