Part I. Methodological Questions Chapter 1: The Mysteries of Marriage: Its Function, Evolution, and Development, Glenn E. Weisfeld and Carol Cronin Weisfeld Chapter 2: Getting Started: The Construction, Properties, and Applications of the MARQ, Carol Cronin Weisfeld, Ellen Fedon-Keyt, Michael J. R. James, Samantha Lewis, and Emilia D. Shinne Chapter 3: Getting It Right: Why Invariance Testing with Respect to Gender and Culture Is Important, Craig A. Wendorf and Todd Lucas Chapter 4: Looking at Dyads: A Primer on Actor-Partner Analysis in Marriage Research, Keith M. Welker and Richard B. Slatcher Part II. Marriage in Various Cultures around the World Chapter 5: Are Culture, Sex Differences, Similarity, and Personality Important in Marriage? Evidence from Great Britain and Elsewhere,Glenn E. Weisfeld Chapter 6: Cultural and Self-Related Considerations in Relationship: Well-Being With Particular Reference to Marriage in Turkey, E. Olcay Imamoglu and Emre Selcuk Chapter 7: The Changing Family in China, Jiawen Wang and Carol Cronin Weisfeld Chapter 8: The Changing Family in Russia, Marina L. Butovskaya and Zhanna Rozenberg Chapter 9: Marriage in Brazil Preliminary Findings Using the MARQ, Keila Rebello, Kraig S. Shattuck, Mauro Silva, Jr., and Regina Sousa Brito Chapter 10: The American Family in the 21st Century: Some Things are Changing, Some Not, Carol Cronin Weisfeld, Annamaria Silveri, and Ellen Fedon-Keyt Chapter 11: From Machismo to Caballerismo: Mate Guarding Tactics in Latino Men, Yobany Pardo Chapter 12: African-American Married Couples, Cheryl C. Munday, Koyonne R. Mims, Ahmar Zaman, and Bruce Howard Chapter 13: Love Is Love: Same-sex Couples, Lisa M. Dillon Part III. Cross-Cultural Patterns in Aspects of Marriage Chapter 14: Beyond the Honeymoon: Physical Attraction and Its Role throughout Marriage, Annamaria Silveri and Maria Faustina Samayoa Chapter 15: God Help Us: Spirituality and Religiosity in Marriage, Margaret Stack and Carrie A. F. Nantais Chapter 16: Humor in Marriage, Glenn E. Weisfeld Chapter 17: Sex and Infidelity, Lisa M. Dillon, Nicole T. Nowak and Glenn E. Weisfeld Chapter 18: Sources of Conflict in Marriage, Tara DeLecce Part IV. Conclusions and Future Directions Chapter 19: Cross-cultural Social/Behavioral Research: Ethical Principles and Review Processes, Kelly O'Keefe, Ian J. Moore, and Elizabeth M. Hill Chapter 20: Causes of Marital Conflict: Reflections from a Clinician, Margaret Stack Chapter 21: Towards a Model of Marriage, Glenn E. Weisfeld, Carol Cronin Weisfeld, and Stefan M. M. Goetz