Whether military service was lawful for a Christian at all was at the time of the Reformation one of the most keenly debated questions; and considering the force of opinion arrayed on the negative side, its ultimate decision in the affirmative is a matter of more wonder than is generally given to it. Sir Thomas More charges Luther and his disciples with carrying the doctrines of peace to the extreme limits of non-resistance; and the views on this subject of the Mennonites and Quakers were but what at one time seemed not unlikely to have been those of the Reformed Church generally. By far the foremost champion on the negative side was Erasmus, who being at Rome at the time when the League of Cambray, under the auspices of Julius II., was meditating war against the Republic of Venice, wrote a book to the Pope, entitled ‘Antipolemus,’ which, though never completed, probably exists in part in his tract known under the title of ‘Dulce Bellum inexpertis,’ and printed among his ‘Adagia.’ In it he complained, as one might complain still, that the custom of war was so recognised as an incident of life that men wondered there should be any to whom it was displeasing; and likewise so approved of generally, that to find any fault with it savoured not only of impiety, but of actual heresy. To speak of it, therefore, as he did in the following passage, required some courage: ‘If there be anything in the affairs of mortals which it is the interest of men not only to attack, but which ought by every possible means to be avoided, condemned, and abolished, it is of all things war, than which nothing is more impious, more calamitous, more widely pernicious, more inveterate, more base, or in sum more unworthy of a man, not to say of a Christian.’ In a letter to Francis I. on the same subject, he noticed as an astonishing fact, that out of such a multitude of abbots, bishops, archbishops, and cardinals as existed in the world, not one of them should step forward to do what he could, even at the risk of his life, to put an end to so deplorable a practice.