“…Second, there exists a multidimensional and complex interdependence between the explanatory variables, indicating serious policy implications for Afghanistan when developing relevant policies. The results are consistent with those of Mehrara et al [ 80 ], Sghari [ 81 ], Lago-Peñas et al [ 82 ], Marta and Noelia [ 83 ], Ashiabi et al [ 84 ], Owusu et al [ 85 ], Lakshmana [ 86 ], Linden and Ray [ 87 ], Akif and Torusdağ [ 88 ], Lopreite and Zhu [ 89 ], Yetim et al [ 34 ], Rahman and Alam [ 90 ], Doğan et al [ 91 ], Dhrifi [ 92 ], Abbas and Awan [ 93 ], Bilgili et al [ 94 ], and Yang et al [ 95 ], who also provided statistical evidence on the significant relationships between health spending, gross domestic product, child mortality rate, and the age dependency ratio in different geographical contexts. the present study, in addition to extending the findings for Afghanistan, adds to the existing literature and provides evidence on the bidirectional causality nexus between health spending and long-run civil war proxied by the per capita cost of war in Afghanistan.…”