 Much current work on the subject was sparked by a series of papers by JC Beall and Greg Restall (Beall &amp; Restall 2000, 2001; Restall 2002), which culminated in the book (Beall &amp; Restall 2006). This work has generated a substantial literature, including papers arguing against pluralism and for logical monism, the view that there can only be One True  Logic.[2.]  Interest in the contemporary debate has also led to a re-examination of some older views, especially the pluralism resulting from Carnap’s famous tolerance for different linguistic frameworks and the work of Scottish/French logician Hugh McColl (1837–1909), who some have claimed was an early logical pluralist (Rahman &amp; Redmond 2008).  The recent upsurge of interest has also resulted in the proposal of several additional varieties of logical pluralism, some of which are surveyed in the final section below. 