Here are past answers & discussions on the topic:
[28 Apr. 2014 | 99 c] [Flaired Respondent | Nature of Roman Citizenship & Security](http://redd.it/2486xa "In The West Wing, President Bartlet says "two thousand years ago a Roman citizen could walk across the face of the known world free of the fear of molestation, cloaked only in the protection of the words civis Romanus -- I am a Roman citizen." Is this true? : AskHistorians")
[06 July 2013 | 6 c] Flaired Respondent | Roman Citizens' Privileges
[09 Dec. 2013 | 13 c] [Detailed Analysis | Medieval Interpretation of Pax Romana, the Origin of the West Wing Interpretation](http://redd.it/1sgm75 "Repost: Civus Romanus Sum. Was one of the subtexts really "Mess with me, and Rome will annihilate you and yours"? : AskHistorians")
Direct followup questions to specific flaired specialists by commenting with the question and their username with a /u/ appended to it i.e. /u/OldWorldGlory.