De Legibus (On the Laws) is a philosophical dialogue between: Cicero's friend Titus Pomponius Atticus; Cicero's brother Quintus; and Cicero himself. The dialogue is written in the style of Plato who was greatly revered by Cicero. De Legibus forms a continuation of Cicero's own work De re Publica (On the Commonwealth or On the Republic) and is also a response to Plato's work Νόμοι (Laws). It is unknown how many books the work originally contained but several complete books have been lost. Cicero's emphasis in the surviving work is on the nature and purpose of law as opposed to providing answers to specific legal questions which Cicero considered a mundane pursuit for a lower sort of person...

De Natura Deorum (On the Nature of the Gods) outlines Stoic, Epicurean and Academic (Skeptical) views on religious questions. Problems discussed include: evil, the origin of the world, divination, and characteristics of God(s).

On the Ends of Good and Evil (Latin: DE FINIBUS BONORUM ET MALORUM) discusses Skeptic, Epicurean, Stoic, Peripatetic and Academic views on the good life. Written by Marcus Tullius Cicero. Translated by Harris Rackham.

A philippic is a fiery, damning speech delivered to condemn a particular political actor. The term originates with Demosthenes, who delivered an attack on Philip II of Macedon in the 4th century BCE.

Cicero consciously modeled his own attacks on Mark Antony, in 44 BC and 43 BC, on Demosthenes’s speeches, and if the correspondence between M. Brutus and Cicero are genuine [ad Brut. ii 3.4, ii 4.2], at least the fifth and seventh speeches were referred to as the Philippics in Cicero’s time. They were also called the Antonian Orations by Aulus Gellius. It is ironic that they were named after a series of speeches that failed to effectively warn the Greeks of the danger of Philip of...

On Duties (Latin: DE OFFICIIS) discusses virtue, expediency and apparent conflicts between the two. St. Ambrose, St. Jerome and other Doctors of the Roman Catholic Church considered it to be legitimate for study. It was the second book after the Bible printed on Gutenberg's press and a standard text taught at Eton College. Written by Marcus Tullius Cicero. Translated by Walter Miller.

Tusculan Disputations (Latin: TUSCULANARUM DISPUTATIONUM) is divided into five books which discuss death, pain, grief, perturbations and virtue. At issue is whether wise people can always be happy regardless of the apparent evil that fortune throws in their way. Andrew Peabody says the A. and M. in the text may stand for Auditor, Adolescens, Atticus or Aulus and Marcus or Magister. Written by Marcus Tullius Cicero. Translated by Charles Duke Yonge.