Acknowledgments . . vii 
Introduction . . 1

Part 1. Establishing Basepoints for Dialogue 
1. Red Hats: Catholic Sexual Ethics in the Face of Church Authority . . 23 
2. White Coats: Boundary Disputes between Scientific and Religious Authority . . 32 
3. What's All the Fuss About? The Conflict between Science and Religion over Sexual Diversity . . 46 
4. Medieval Attitudes toward Philosophia Naturalis in Relation to Scientia Moralis . . 57 
5. Patriarchy, Purity, and Procreativity: Developments in Catholic Teachings on Human Sexuality and Gender . . 69 

Part 2. Reflecting on Human Sexual Diversity 
6. Evolutionary Biology and Sexual Diversity . . 89 
7. The Evolution of Sex . . 105 
8. Interpreting the Theology of Creation: Binary Gender in Catholic Thought . . 123 
9. "Passing" and Identity: A Literary Perspective on Gender and Sexual Diversity . . 140 
10. Monogamy and Sexual Diversity in Primates: Can Evolutionary Biology Contribute to Christian Sexual Ethics? . . 155 
11. "In Gods Image" and "Male and Female": How a Little Punctuation Might Have Helped . . 167 

Part 3. Sexual Diversity and Christian Moral Theology 
12. Social Selection and Sexual Diversity: Implications for Christian Ethics . . 187 
13. The Triumph of Diversity: Hopkins's "Pied Beauty" . . 201 
14. Christ as Bride: Toward a Christology of Diversity . . 211 
15. Gender in Heaven: The Story of the Ethiopian Eunuch in Light of Evolutionary Biology . . 224 
Conclusion: Descriptive and Normative Ways of Understanding Human Nature . . 241 

Bibliography . . 259 
Contributors . . 277 
Scripture Index . . 281 
Subject and Author Index . . 282