book attempts to bring some order into the field. The study draws on an inventory of empirical investigations which involved valid indicators of happiness; 245 studies are involved, which together yield some 4000 observations: for the main part correlational ones. These results are presented in full detail in the simultaneously published 'Databook of Happiness' (Veenhoven 1984). The present volume distils conclusions from that wealth of data. It tries to assess the reality value of the findings and the degree to which correlations reflect the conditions of happiness rather than the consequences of it. It then attempts to place the scattered findings in context. As such, this work is not a typical study of literature on happiness.