In the work of simplifying conditions artificially the lawyers had several strong reagents at their disposal. The mighty influence of Roman law has been often noticed, and there can be no doubt that it was brought to bear on our subject to the prejudice of the peasantry and to the extinction of their independent rights. It would not have been so strong if many features of the vernacular law had not been brought half way to meet it. Norman rules, it is well known, exercised a very potent action on the forms of procedure[245]; but the substantive law of status was treated very differently in Normandy and in England, and it is not the influx of Norman notions which is important in our case, but the impetus given by them to the development of the King's Courts. This development, though connected with the practice of the Duchy, cannot be described simply or primarily as Norman. Once the leaven had been communicated, English lawyers did their own work with great independence as well as ingenuity of thought, and the decision of the King's Court was certainly a great force. I need not point out again to what extent the law was fashioned by the writ procedure, but I would here recall to attention the main fact, that the opposition between 'free' and 'unfree' rested chiefly on the point of being protected or not being protected by the jurisdiction of the King's Court. [Social bias of legal theories.] If we examine the action of lawyers as a whole, in order to trace out, as it were, its social bias, we must come to the conclusion that it was exercised first in one direction and then in the opposite one. The refusal of jurisdiction may stand as the central fact in the movement in favour of servitude, although that movement may be illustrated almost in every department, even if one omits to take into account what may be mere instances of bad temper or gross partiality. But the wave begins to rise high in favour of liberty even in the thirteenth century. It does not need great perspicuity to notice that, apart from any progress in morals or ideas, apart from any growth of humanitarian notions, the law was carried in this direction by that development of the State which lays a claim to and upon its citizens, and by that development of social intercourse which substitutes agreement for bondage. Is it strange that the social evolution, as observed in this particular curve, does not appear as a continuous _crescendo_, but as a wavy motion? I do not think it can be strange, if one reflects that the period under discussion embraces both the growth and the decay of feudalism, embraces, that is, the growth of the principle of territorial power on the ruins of the tribal system and also the disappearance of that principle before the growing influence of the State. [Influence of conquest.]