In the field of political satire Dryden was a master, and his work here is interesting as showing that unfortunate alliance between literature and politics which led many of the best English writers of the next century to sell their services to the Whigs or Tories. Dryden sided with the later party and, in a kind of allegory of the Bible story of Absalom's revolt against David, wrote "Absalom and Achitophel" to glorify the Tories and to castigate the Whigs. This powerful political satire was followed by others in the same vein, and by "MacFlecknoe," which satirized certain poets with whom Dryden was at loggerheads. As a rule, such works are for a day, having no enduring interest because they have no human kindness, but occasionally Dryden portrays a man of his own time so well that his picture applies to the vulgar politician of all ages, as in this characterization of Burnet: Prompt to assail and careless of defence, Invulnerable in his impudence, He dares the world, and eager of a name He thrusts about and justles into fame; So fond of loud report that, not to miss. Of being known (his last and utmost bliss), He rather would be known for what he is. These satires of Dryden were largely influential in establishing the heroic couplet, [Footnote: The heroic couplet consists of two iambic pentameter lines that rime. By "pentameter" is meant that the line has five feet or measures; by "iambic," that each foot contains two syllables, the first short or unaccented, the second long or accented.] which dominated the fashion of English poetry for the next century. The couplet had been used by earlier poets, Chaucer for example; but in his hands it was musical and unobtrusive, a minor part of a complete work. With Dryden, and with his contemporary Waller, the making of couplets was the main thing; in their hands the couplet became "closed," that is, it often contained a complete thought, a criticism, a nugget of common sense, a poem in itself, as in this aphorism from "MacFlecknoe": All human things are subject to decay, And when Fate summons, monarchs must obey. [Sidenote: PROSE WORKS] In his prose works Dryden proved himself the ablest critic of his time, and the inventor of a neat, serviceable style which, with flattery to ourselves, we are wont to call modern. Among his numerous critical works we note especially "An Essay of Dramatic Poesy," "Of Heroic Plays," "Discourse on Satire," and the Preface to his _Fables_. These have not the vigor or picturesqueness of Bunyan's prose, but they are written clearly, in short sentences, with the chief aim of being understood. If we compare them with the sonorous periods of Milton, or with the pretty involutions of Sidney, we shall see why Dryden is called "the father of modern prose." His sensible style appears in this criticism of Chaucer: