The regulation of many activities depends on whether societies consider them morally controversial or "repugnant". Not only have regulation and related ethical concerns changed over time, but there is also heterogeneity across countries at a given time. We provide evidence of this heterogeneity...

This article offers a framework for understanding the democratic peace phenomenon across three levels of analysis. Specifically, Kohlberg’s structural-development model of moral reasoning offers an understanding of how individuals (e.g., national leaders, public officials) may approach...