Causes (1) History (1) Performance anxiety (1) Worry (1) Stage fright (1) Social history (1) Social classes (1) Popular culture (1) Politics, Practical (1) Political science (1) Nationalism (1) Maintenance (1) Loans (1) Inheritance and succession (1) Gaze (1) Etiquette (1) Communism (1) Chinese (1) Political and social views (1) Transfer (1) Social life and customs (1) Science (1) Evolution (1) Origin (1) Ansiedad escénica (1) Origen (1) Preocupación (1) Ciencias (1) Marxismo-leninismo (1) Etiqueta (1)