Neural signatures with willingness to fight and die for sacred values. (a) Activity in the dorsolateral prefrontal cortex (dlPFC), the inferior frontal gyrus (IFG) and the superior parietal cortex was decreased during sacred compared with non-sacred value assessment (T = 3.40, p < 0.05 FWEc, single voxel p < 0.001). The colour bar represents t-values. (b) Parameter estimates of the clusters of activation in the dlPFC, dorsomedial prefrontal cortex (dmPFC), IFG and parietal lobule (binary masks extracted from the non-sacred values greater than sacred values contrast) were negative and significantly lower for the sacred values greater than baseline contrast compared with the non-sacred values greater than baseline contrast (marked with *, dlPFC: Wilk's lambda = 0.7951, F1,28 = 7.21, p < 0.012; dmPFC: Wilk's lambda = 0.661, F1,28 = 14.33, p < 0.001; IFG: Wilk's lambda = 0.7951, F1,28 = 7.21, p < 0.012). (c) During ratings, vmPFC showed a positive parametric response to willingness to fight and die for sacred values (small volume correction, T = 3.40, p < 0.05 FWEc, single voxel p < 0.001, in red).