Informal housing and natural resource conflicts are common in Latin America. However, academics have rarely linked these social phenomena. This book proposes customary property (an extralegal entitlement founded in the social norms of a given community) as a common lens to analyze, understand and potentially solve the struggles that are found in informal housing and mining natural resource conflicts. This book shows how land titling policies inspired in De Soto’s work have failed in taming the expansion of informal housing. Moreover, this book contests the mainstream explanation for social unrest in developing new mining projects, which attributes it to the separation of surface and mining rights. Finally, the book proposes that the tension between customary property and lack of law enforcement by the State can progressively corrode the rule of law. This book proposes a nuanced version of land titling for informal housing, and a social license legal proceeding for the development of new mining projects. Bottomline, the book aims to replace violence between customary holders and the State for peaceful legal proceedings and negotiation tables. This book is directed to any property scholar and student interested in developing countries, social norms over assets, and natural resource conflicts.