But just as all these startling inconsistencies and aberrations in moral conduct may be explained, in part at least, by reference to the effect upon the moral sympathies of tribal religion, of political rancor and fanaticism, of false theological dogmas, and of bad bequests of practices and conventions unreflectingly adopted by an advanced civilization from ages of barbarism and savagery, so is it possible in the same way to explain and render in a measure comprehensible to ourselves the existence without protest among the comparatively cultured Romans of such an institution as that of the gladiatorial combats. The system was fostered by slavery and the Romans’ occupation of war. The Roman people were originally stern and just; slavery and war tended to make them hard and callous. Slavery created a sort of caste morality, which excluded from the moral sphere large classes as completely as though they belonged to the dumb-animal creation. It was these pariah classes that contributed a large portion of the victims of the cruel sport. The enormous quantities of human flesh and blood required to nourish the system could have been found in no society except in one where a considerable part of the population had been degraded to a mere animal plane of existence and thus put practically beyond the range and reach of the moral feelings. Like slavery, the constant wars in which the Romans were engaged tended to indurate their feelings and to destroy all sense of the sanctity of human life. In what way the military life of the Romans reacted upon their feelings and sentiments and molded even their ethical theories is shown by the fact that the Roman moral philosophers in general defended and approved the combats of the amphitheater on the ground that they inured the soldier to the sight of blood and taught him contempt of death.[539] The effect of these inhuman spectacles upon morality was most lamentable. They hindered the growth of humane feelings in the men, deadened every tender sensibility of the women, habituated the young to scenes of cruelty,[540] and developed finally the normal impassiveness of the Roman temperament into a fierce delight in human suffering.[541] [Sidenote: (_g_) Decay of religious faith] The influence of religion upon Roman morality was never great; still, as we have seen, the Roman’s sense of duty was in some degree strengthened by his belief in the gods and in their general watch over the conduct of men. Hence that growth of philosophic doubt among the learned class which characterized the later period of the Republic, and the transformation of religion into gross superstition among the debased population of the cities, contributed to hasten and render more decisive the moral decline we are tracing. [Sidenote: (_h_) Extremes of wealth and poverty]