This article reviews the findings of 84 sociological studies published over a 15-year period. These studies deal with tests of the modernization and/or social integration perspectives on suicide. Research on modernization, religious integration, and political integration often questioned or reformulated the traditional Durkheimian perspective. A major new theoretical development, Pescosolido's religious networks perspective, gained some empirical support in the 15-year period. The strongest support for social integration theory came from research on marital integration, wherein more than three quarters of the research found a significant relationship. Finally, further research on migration, a force lowering social integration, continued to tend to find a positive link to suicide.