The Bellum Civile is a poem great enough to appeal to readers in different periods for different reasons. Thus Dante hugely admired Lucan (quello grande poeta) while not sharing his political views, since he himself favoured a universal monarchy in which the Emperor in possessing all would be free from all appetite, and, therefore, just. Lucan's portrait of Cato so impressed him that in the Convivio, in an allegorical exposition of B.C. 2.326ff., Cato is taken as a figure for God, and in the Divine Comedy he is the guardian at the foot of Purgatory, although he had been a pagan, a suicide, and an opponent of Julius Caesar whom Dante favoured (Brutus and Cassius are with Judas in the mouths of Satan). Nevertheless it is likely that many of Lucan's admirers have been attracted above all by the poet's espousal of libertas and hatred for autocracy. This must account for Shelley describing the Bellum Civile as ‘a poem as it appears to me of wonderful genius, and transcending Virgil’, a judgement that he conceded would be ‘no less unpopular than some of the others I entertain’, and may also help to explain Milton's interest in Lucan. However, in this century the idea has been widespread that the Bellum Civile is not in any real sense a ‘Republican’ poem. There are signs that this view may be hardening into something like an orthodoxy, according to which the poem, if properly understood, and at least as originally conceived, is in no sense a poem of political protest or opposition, and contains no serious criticism of the Principate as such, even if parts of the later books are coloured by Lucan's personal resentment of Nero (it is sometimes even argued that Lucan intended to finish his epic with praise of the imperial peace and of the Principate as a restored Republic). Lucan's political views are thus taken to be (behind the rhetorical fireworks) approximately the same as those of his uncle Seneca. I shall here consider the principal arguments adduced in the debate, and shall indicate briefly why the question is an important one, even for readers primarily interested in the Bellum Civile as poetry.