HELL AS ANTI-SOCIETY: 

Lower Hell: ever more distorted, violent relations among damned

SOWERS OF DISCORD

Inferno 28 : 

Religious discord: prophet Mohamed, founder of Islam
                                                       Ali, founder of Shiites

Political discord: Mosca dei Lamberti, Buondelmonte murder

TRAITORS

Inferno 32:       

Traitors to country: Bocca degli Alberti, Battle of Montaperti, 1260

Inferno 33:

Traitors to kin: Ugolino

Inferno 34:

The worst traitors: Judas (Christ)  Brutus, Cassius (Julius Caesar)

                              Christ:   symbol of church
                              Caesar: symbol of Roman Empire