Land use and planning law, which to the uninitiated might appear a dry and technical subject, has received increased (and well-deserved) attention in recent years. Land use regulations significantly affect pressing local and national concerns, including housing supply and affordability, regional and national economic growth, social mobility, economic equality, racial integration, and the environment. Growing recognition of the importance of land use and planning law in the United States has given rise to heated discussions regarding the merits of zoning reform, the appropriate scope of local control, the effects of and potential responses to gentrification, and a host of other issues.