Thomas Cranmer desired a general council of the Protestant churches to unite them in confession and form a western, Protestant Church. Oh that it would have happened! God in his providence did not see fit for that to occur. But here is Calvin’s response to Cranmer on the subject:
I know moreover, that your purpose is not confined to England alone; but, at the same moment, you consult the benefit of all the world. The generous disposition and uncommon piety of his Majesty, the king, are justly to be admired, as he is please to favor this holy purpose of holding such a council, and offers a place for its session in his kingdom. I wish it might be effected, that learned and stable men, from the principal churches, might assemble in some place, and, after discussing with care each article of faith, deliver to posterity, from their general opinion of them all, the clear doctrines of the Scriptures. It is to be numbered among the evils of our day, that the churches are so divided one from another, that there is scarcely any friendly intercourse strengthened between us; much less does that holy communion of the members of Christ flourish, which all profess with the mouth, but few sincerely regard in the heart. But if the principal teachers conduct themselves more coldly than they ought, it is principally the fault of the princes who, involved in their secular concerns, neglect the prosperity and purity of the church; or each one, contented with his own security, is indifferent to the welfare of others. Thus it comes to pass, that the members being divided, the body of the church lies disabled.
Respecting myself, if it should appear that I could render any service, I should with pleasure cross ten seas, if necessary, to accomplish that object. Even if the benefit of the kingdom of England only was to be consulted, it would furnish a reason sufficiently powerful with me. But as in the council proposed, the object is to obtain the firm and united agreement of learned men to the sound rule of Scripture, by which churches now divided may be united with each other, I think it would be a crime in me to spare any labor or trouble to effect it. But I expect my slender ability to accomplish this will furnish me with sufficient excuse. If I aid that object by my prayers, which will be undertaken by others, I shall discharge my part of the business. Melancthon is so far from me, that our letters cannot be exchanged in a short time. Bullinger has perhaps answered you before this. I wish my ability was equal to the ardency of my desires. But what I at first declined, as unable to accomplish, I perceive the very necessity of the business now compels me to attempt. I not only exhort you, but I conjure you, to proceed, until something shall be effected, if not every thing you could wish.
Perhaps we will see more unity built from the confusion of our day, although it now seems doubtful.