This chapter argues that the currency of Higden’s Polychronicon in later medieval England attests to the profound historiographical investments of a spectrum of polemicists, preachers, translators, and poets. English writers discovered in the Polychronicon a master genre for broad and diverse political engagement and an innovative form with which to theorize a range of issues, especially those pertaining to the institutional Church. The hot topics that modern scholars tend to associate with Wycliffism were given a discursive heft and complexity through the literary appropriation of Higden’s universal history, as we see in Trevisa’s commentary on the Polychronicon, as well as in Langland’s Piers Plowman. In this view, radical historiography leads to radical ecclesiology when compendious genres become loci for the political imaginary.