This lecture provides an in-depth exploration of corruption, defining it as the abuse of entrusted power for private gain. The instructor discusses various types of corruption, including petty, grand, and political corruption, and highlights the actors involved in each type. The lecture emphasizes the multidimensional nature of corruption, illustrating how it can manifest in different sectors and contexts. The relationship between corruption and development is examined, revealing a negative correlation between perceived corruption and economic growth. The instructor raises critical questions about the effectiveness of anti-corruption measures and the need for context-specific solutions. The lecture also addresses the social norms that perpetuate corrupt behaviors and discusses innovative approaches to combat corruption, particularly in public health systems. By analyzing case studies and interventions, the instructor illustrates how understanding the social dynamics of corruption can lead to more effective strategies for promoting integrity and accountability in governance.