 Marcus Tullius Cicero (106–43 BCE) is best known to posterity as a prominent statesman and orator in the tumultuous period of the late Roman republic. As well as being a leading political actor of his time, he also wrote voluminously. Among his writings, around a dozen philosophical works have come down to us. Philosophy was a lifelong passion for Cicero. In addition to what one might call his strictly philosophical compositions, much else of what he wrote – including his speeches, works on rhetoric, and a large collection of letters – show evidence of his philosophical interests. In terms of modern scholarship, the value of Cicero’s philosophical work was held, until relatively recently, to lie chiefly in the information it provided about the thought of the leading philosophical schools of his day: Stoicism, Epicureanism and Academic scepticism among them. However, in part because of the creative way in which he engages with his predecessors, he is increasingly studied today as a philosophical thinker of independent interest.