De OfficiisCiceroRead freeBuy on AmazonAppears in 4 ideasPolitics/EthicsLawWhat is the relationship between law, justice, and human nature?EthicsDutyWhat binds us to act rightly, and from where does moral obligation arise?Virtue and ViceWhat makes a person virtuous, and can virtue be taught?PoliticsStateWhat is the state, and does it exist for the sake of its citizens or they for it?