Basic income is one of the most innovative, powerful, straightforward, and controversial proposals for addressing poverty and growing inequalities. A Basic Income Guarantee (BIG) is designed to be an unconditional, government-insured guarantee that all citizens will have enough income to meet their basic needs. The concept of basic, or guaranteed, income is a form of social provision and this series examines the arguments for and against it from an interdisciplinary perspective with special focus on the economic and social factors. By systematically connecting abstract philosophical debates over competing principles of BIG to the empirical analysis of concrete policy proposals, this series contributes to the fields of economics, politics, social policy, and philosophy and establishes a theoretical framework for interdisciplinary research. It will bring together international and national scholars and activists to provide a comparative look at the main efforts to date to pass unconditional BIG legislation across regions of the globe and will identify commonalities and differences across countries drawing lessons for advancing social policies in general and BIG policies in particular.