Diogenes Laertius' list of Speusippus' works includes titles on justice, friendship, pleasure, and wealth. Clement of Alexandria (fr. 77 Tarán) reports that Speusippus considered happiness to be "a state that is complete in those things that are in accordance with nature, a condition desired by all human beings, while the Good aim at freedom from disturbance; and the virtues would be productive of happiness." This testimony suggests that Speusippus' ethics may have been an important background to ethical ideas of the Stoics (the will's conformity with nature) and Epicureans (compare "freedom from disturbance," "aochlēsia", with the notion of "ataraxia").