In the procuring of historic materials Polybius shows a caution and perseverance such as are not perhaps paralleled in antiquity; he avails himself of documents, gives comprehensive attention to the literature of different nations, makes the most extensive use of his favourable position for collecting the accounts of actors and eye-witnesses, and, in fine, methodically travels over the whole domain of the Mediterranean states and part of the coast of the Atlantic Ocean.( 28) Truthfulness is his nature.

In all great matters he has no interest for one state or against another, for this man or against that, but is singly and solely interested in the essential connection of events, to present which in their true relation of causes and effects seems to him not merely the first but the sole task of the historian.

Lastly, the narrative is a model of completeness, simplicity, and clearness.

Still all these uncommon advantages by no means constitute a historian of the first rank.
Polybius grasps his literary task, as he grasped his practical, with great understanding, but with the understanding alone.
History, the struggle of necessity and liberty, is a moral problem; Polybius treats it as if it were a mechanical one.

The whole alone has value for him, in nature as in the state; the particular event, the individual man, however wonderful they may appear, are yet properly mere single elements, insignificant wheels in the highly artificial mechanism which is named the state.