“…The shift in understanding of what triggers gratitude (Algoe et al, 2008) also shifts understanding of its potential social functions: understanding gratitude as a detection and response system for promoting high-quality relationships with people who have demonstrated care for one's welfare has led to predictions about a wide variety of social behavioral outcomes beyond reciprocity among adults (e.g., Bartlett, Condon, Cruz, Baumann, & Desteno, 2012;Jia, Lee, & Tong, 2015;Jia, Tong, & Lee, 2014). Vaish and Hepach (2020) describe an elegant experiment that suggests, for children, gratitude is also about the specific relationship with the benefactor who cares about the child (Vaish, Hepach, & Tomasello, 2018). Going forward, I encourage them to move beyond the potential limitations of narrowly considering that gratitude solves the reciprocity problem, and instead broadly consider that reciprocity is just one tool to help humans solve the having good relationships problem.…”