These bibliographies will give you a very complete approach on the city, and some elements on the commitment:
On the city:
– The city policy C. Chaline Que sais-je ?
– Urban sociology H. Marchal QSJ
– Urban violence and insecurity Ch Souliez QSJ
– When the city unravels J. Danzelot Poche
On commitment :
– Indignez-vous! and Engage yourself! Stéphane Hessel
– Plaidoyer pour les Intellectuels JP Sartre.
– On Civil Disobedience D. Thoreau
– Literature and commitment B. Denis point Seuil
– Le Siècle des Intellectuels M. Winock Point Seuil
– L’Homme révolté A. Camus