1945- 20thcentury american americannationalcharacteristics artcriticism arthur arts aspectpsychologique casestudies collectiefgeheugen collectivememory conditionssociales crises crises(aspectospsicológicos) crises(sciencessociales) criticismandinterpretationsymons englishpoetry general greatbritain histoire historischesereignis history históriadosestadosunidos knowledgesymons kollektivesgedächtnis local memory memória(aspectossociais) mémoirecollective nationalcharacteristics politiekecrises psychischestrauma psychologicalaspects psychologicalaspectsofcrises socialaspects socialaspectsofmemory socialconditions state unitedstates étudesdecas