This dataset contains data of the Just War Beliefs Scale (JWBS) from Colombia and Spain. Data and codebooks are provided in csv format, following the FAIR principles. Three files are provided:1. dataset JWBS Colombia and Spain, with the data related to sample characteristics and the answers to the questionnaire items in the three countries.2. Database codebook of variables, with information of the labels of the variables of the HC-Pairs data file.3. Variable values codebook, with the labels of the values of the variables in the HC-Pairs data file. Although all variables were answered in Spanish, the sociodemographic information has been translated into English for clarity. The items on the JWBS and the items on the Collective Narcissism Scale have been retained in Spanish, as well as the response options.