This lecture introduces the field of social psychology, focusing on the study of how individuals are influenced by others, the social context, norms, communications, and group knowledge. The instructor presents the course objectives, the thematic focus for the year, evaluation methods, and the academic year plan. Students will explore empirical research in social psychology, environmental social psychology literature, experimental approaches, and the importance of understanding social behaviors. The lecture also covers the impact of mastery goals on academic achievement, the psychological barriers to climate change mitigation, and visionary declarations for education by 2050.