Big discoveries of high value natural resources can have negative economic, political, and social effects long before full production of a resource begins. While Tanzania has already experienced some tensions around the country’s gas discovery, there is consensus among scholars and practitioners that the country has thus far generally avoided experiencing economic and political problems because of the discovery. Political risks remain, however, and continued immunity to the pre-source curse, and ultimately to the resource curse, will require ongoing, sound political decisionmaking about how to react to the promise of potentially large future resource revenues.