No / Over the years, the quest for a better society has led to the birth of a variety of composite indices of development, from the gross domestic product to the happiness index. These indices usually integrate various social, cultural, psychological, and political aspects and are considered of vital importance for evaluating a country’s level of development and for assessing the impact of policy especially in the public sector. Overall, they consist of numerical measures that describe the well-being of both the individual and the society as a whole. This Special Issue on Indices for the Betterment of the Public of Socio-Economic Planning Sciences includes thirteen research articles by authors from Belgium, Colombia, Greece, India, Iran, Italy, Peru, Portugal, Spain, and the United Kingdom.