Edward Irving and the Rapture

Did key elements of the doctrine of the pretribulational rapture originate with either Edward Irving (1792–1834) or the broader Irvingite movement and then conveyed to John Nelson Darby (1800–1882) and the Brethren? This is the general thesis put forth in dozens of books and articles for many years. However, I do not believe that there is merit to such a position since Irving and his movement never taught pretribulationism and both come from very different eschatological systems...