This study is designed to test the hypothesis that globalization, market integration, and technological change result in more dispersed kin networks which in turn reduces fertility and support from alloparents, but that religious beliefs buffer against these changes by helping to maintain dense kin networks despite market integration. We therefore aim to test the hypothesis that a key factor underlying the higher fertility, alloparenting, and cooperation that is commonly observed amongst people who score high in religiosity is less dispersed (i.e. tighter) kin networks.