stratification (1) société (humaine) (1) recherche (1) métropole (1) point (1) Context (1) Composition (1) Article (1) Transportation (1) Social classes (1) Research (1) Portuguese (1) Population (1) Migration, Internal (1) Middle class (1) Identity (Philosophical concept) (1) Hand (1) Grammar, Comparative and general--Article (1) Expression (1) Dilemma (1) Civilization, Modern (1) Article (1) Actors (1) Research (1) Population (1) Emphasis (1) main (1) pointe (1) transport (1)