 Further reading: For discussion of IIIp4, see Matson 1977 and Garrett 2002. For interpretations of Spinoza’s argument from IIIp4–IIIp6, see Curley 1988; Della Rocca 1996; Garrett 2002 and Lin 2004. For discussions of historical sources of the striving doctrine, see James 1993, Wolfson 1934, and LeBuffe 2010a, pp.101–102.  Youpa 2003 offers an account of self-preservation in Spinoza.  For Spinoza’s physics and his use of Descartes, see Lachterman 1978, Peterman 2015 and 2017, and Schliesser 2017. Most book-length interpretations of the Ethics include detailed accounts of Spinoza’s view of human nature. For discussion of IIIp9, see LeBuffe 2004 and 2010a, Chapters 5–7. Some of the best general discussions of psychological egoism come in the context of the interpretation of Hobbes, to whom Spinoza is sometimes compared. For these, see Kavka 1986 and Hampton 1986.