<p>This article examines why some states emerging through decolonization are more actively contributing to international organizations (IOs) than others, focusing on their voluntary financial contributions to the United Nations System (UN). I argue that the birth legacies of states, particularly modes of decolonization, significantly influence their subsequent financial contributions to the UN. A regression analysis of 95 former colonies, mandates, and dependencies suggests that states with a negative legacy – derelict decolonization – provide larger financial contributions to the UN. This finding highlights the impact of colonial history on state behavior within IOs and suggests that former colonies may seek active participation in global governance, valuing international resources highly.</p>