In this, as in the former case, it is only in modern times that important notices occur concerning forms of unbelief. The circumstance that in the early ages unbelief took the form of opposition or persecution on the part of heathens, and that in the middle ages it was so rare, caused the ancient church historians and mediæval church chroniclers to record little respecting actual unbelief, though they give information about heresy. Even in modern times, it is not till the early part of the eighteenth century that any attention is bestowed on the subject. The earlier historians, both Protestant, such as the Magdeburg Centuriators, and Catholic, like Baronius, wrote the history of the past for a controversial purpose in relation to the contests of their own times: and in the next period, in the one church, Arnold confined himself to the history of heresy rather than unbelief; and in the other, Fleury and Tillemont wrote the history of deeds rather than of ideas, and afford no information, except in a few allusions of the latter writer to the early intellectual opposition of the heathens. But about the middle of the eighteenth century, in the period of cold orthodoxy and solid learning which immediately preceded the rise of rationalism, as well as in that of incipient free thought, we meet not only with the historians of theological literature already named above, but with historians of thought like Brucker, and of the church like Mosheim, possessed of large taste for inquiry, and wide literary sympathies, who contribute information on the subject: and towards the close of the century we find Schröckh, who, in his lengthy and careful history of the church since the Reformation,(25) has taken so extensive a view of the nature of church history, that he has included in it an account of the struggle with freethinkers. Among the same class, with the exception that he differs in being marked by rationalist sympathies, must be ranked Henke.(26) In the present century the spread of the scientific spirit, which counts no facts unworthy of notice, together with the attention bestowed on the history of doctrine, and the special interest in understanding the fortunes of free thought, which sympathy in danger created during the rationalist movement, prevented the historians from passing lightly over so important a series of facts. It may be sufficient to instance, in proof, the notices of unbelief which occur in Neander’s _Church History_. General histories also of literature, like Schlosser’s _History of Literature in the Eighteenth Century_, or the more theological one of Hagenbach (_Geschichte des 18__n__ Jahrhunderts_) incidentally afford information. The various works just named are the chief of this class which furnish assistance.