This lecture explores the concept of neighborhood dynamics, focusing on the interplay between spatial proximity and social interactions. It delves into the significance of neighborliness, the challenges of defining proximity scales, and the impact of spatial proximity on social relationships. The lecture also discusses the role of neighborhood resources, discrimination in housing markets, and the formation of privileged relationships within communities. Additionally, it examines the building as a unit of analysis for understanding neighborhood networks and the complexities of maintaining social ties despite physical proximity.