This book reconceptualises the relational approach to global justice to analyse what and why former colonial states owe their former colonies. While arguments for lifting restrictions on a former empire's citizens right to enter the metropolis are usually based on cosmopolitan egalitarian grounds (the universal equality of persons) and humanitarian grounds, Abumere's postcolonial relational approach bases the argument for lifting such restrictions on the grounds of: the colonial historical relationship between former colonial states and their former colonies; and specifically, the historical injustice that characterised the relationship.