The study analyzes the relationship between a set of psychosocial variables and Subjective Well-Being, namely, personality, attachment styles, cultural values, concepts of love, experiences and quality of relationships. Five samples were collected, in Portugal, Mozambique, the USA, Sweden and India, from 500 participants in each country. We develop mediation, moderation and comparison analyzes between the different countries, using structural equation models. The study was developed with the collaboration of researchers from several national and international universities, namely: ISCTE - IUL, Francisco Esteves, PhD; the Department of Psychology of the University of Virginia - UVa, Sigehiro Oishi, PhD; the Department of Psychology of the University of East Carolina, Derrick Wirth; the Institute of Social Sciences of the University of Lisbon - ICS, Cícero Pereira, PhD. The study resulted in several national and international publications with an impact. Project Financed by the Foundation for Science and Technology, between 2007 and 2015 - BPD / 26479/2006.