Under ecclesiastical tuition the people of Europe had, during the twelfth century, developed, in what passed for religion, a spirit of rancour that went beyond even the cruel legislation of the time. Heresy had previously been detected mainly by means of ordeals, but these were found to be somewhat unreliable in the matter of results. The Bishops, under the authority of the State, had usually controlled the proceedings, but they had now grown sluggish and lax, and their machinery had become rusty. Pope Alexander III, in 1179, “invited sovereigns to employ force of arms and protect Christian people from the violence [!] of the Cathari,” and “offered indulgences to those who should accomplish this work of piety.”[23] The decrees of Lucius III in 1184 might, had they been put into effective operation, have resulted in an episcopal instead of a Papal Inquisition. Not only were rulers bound by oath to assist the Church in rooting out heresy, but all prelates were compelled to visit towns and villages, to call the people together, and take evidence as to the existence of suspected heretics. The Bishops were, indeed, by virtue of their office, Inquisitors also,[24] but of so lukewarm a description that a sterner organization was deemed necessary. Thus the ancient civil and canon law furnished the basis of the Inquisitorial procedure, and the first detectors of heresy were the laymen of each locality, with whom priests were afterwards associated. For various reasons the Bishops, as a body, proved unequal to their task; trained experts were needed, and the Church was impelled to action both by the force of public opinion and by the logic of its dogmas. The hands of the Church were strengthened by a secular legislation which recognized a gigantic evil, but failed to combat it with vigour and uniformity. Under the presidency of Pope Innocent III, the Lateran Council of 1215 framed a number of severe regulations, but did not succeed in getting them consistently enforced. From 1220 to 1239, therefore, Rome elaborated a series of enactments, based on the Lateran regulations, which amounted to a complete system of persecution. The chief of these enactments was Gregory IX’s Bull of 1231, under which suspected persons were required to prove their innocence or lose their civil rights. Very trivial circumstances, even such as a pale face, were enough to arouse suspicion. Heretics were to be outlawed, and, when condemned, to be burnt, all their property being in that case confiscated and their heirs disinherited. Their houses were to be destroyed, and never rebuilt. The evidence of a heretic was not to be received in a court of justice _except against another heretic_. All rulers and magistrates had to swear, not that they would do justice, but that they would exterminate all heretics. The lands of nobles who favoured the unorthodox were to be forfeited. Every thinker was in a permanently tight corner. Refusal to submit to ecclesiastical authority