Latin America has been a complex laboratory for the development of international investment law. While some governments and non-state actors have remained true to the Latin American tradition of resistance towards the international investment law regime, other governments and actors have sought to accommodate said regime in the region. Consequently, a profusion of theories and doctrines, too often embedded in clashing narratives, has emerged. In Latin America, the practice of international investment law is the vivid amalgamation of the practice of governments sometimes resisting and sometimes welcoming mainstream approaches; the practice of lawyers assisting foreign investors from outside and within the region; and the practice of civil society, indigenous peoples and other actors in their struggle for human rights and sustainable development. Latin America and international investment law describes the complex roles that governments have played vis-à-vis foreign investors and investments; the refreshing but clashing forces that international organizations, corporations, civil society, and indigenous peoples have brought to the field; and the contribution that Latin America has made to the development of the theory and practice of international investment law, notably in fields in which the Latin American experience has been traumatic: human rights and sustainable development. Latin American scholars have been contributing to the theory of international investment law for over a century; resting on the shoulders of true giants, this volume aims at pushing this contribution a little further.