主题词：Labor Movements and Unions; Race, History, and American Society; Human auditory perception and evaluation; American History and Culture; Educational Robotics and Engineering; Diverse Scientific and Economic Studies; Migration, Ethnicity, and Economy; Social Policy and Reform Studies; Employment and Welfare Studies; Political and Economic history of UK and US; Australian History and Society; Political Economy and Marxism; Historical Economic and Social Studies; International Labor and Employment Law; Italian Fascism and Post-war Society; Canadian Identity and History; French Historical and Cultural Studies; European history and politics; Communism, Protests, Social Movements; Anarchism and Radical Politics; Legal case studies and regulations; American Constitutional Law and Politics; Earthquake and Disaster Impact Studies; Vietnamese History and Culture Studies; Historical and Contemporary Political Dynamics