In this article, the authors seek to test the theory that the veiling of women is a form of male mate guarding strategy, especially in harsh environments (specifically those with poor health and high mortality). They test this hypothesis using survey data drawn from 25 majority Muslim countries. This theory found support in the results of their statistical tests. In addition to testing the hypotheses articulated in the paper (as noted above), they also ran correlations between income level, importance of religion, and a countries sex ratio and views on the importance of veiling.