The Church of Science also includes a missionary organization whose purpose is to spread the Church's spiritual dominion (and hence the Foundation's political control) to other worlds. However, Hober Mallow remarks in "The Merchant Princes" that "however well your religion has succeeded in the Four Kingdoms, scarcely another world in the Periphery has accepted it." One of the exceptions to Mallow's remark is the planet Askone, and as revealed in Part IV of "Foundation", "The Traders", Askone was first brought within the Foundation's orbit by a trader, with the priesthood only following on afterwards.