Foreign policy elites are often labeled "hawks" or "doves," and states' foreign policies can vary widely depending on whether hawks or doves prevail. Yet seldom asked is this question: why are some elites hawks and others doves? I seek to answer this question. A few previous studies also address this question. However, they typically suffer one or both of the following shortcomings. First, they often overlook variations among elites within the hawk and dove categories. Second, they typically fail to systematically assess the characteristics distinguishing hawks from doves. I provide an improvement by systematically assessing the characteristics distinguishing hawks from doves and exploring differences among elites within the two categories. Specifically, I propose a psychology-based six-fold typology comprising three hawkish and three dovish decision maker types. I distinguish among the types via differing operational codes, personality traits, hypothesized susceptibilities to cognitive errors/biases, and hypothesized foreign policy positions. To test my typology's validity, I examine content analysis of selected George W. Bush administration officials' verbal behavior. This facilitates determining if elites are classifiable via my typology. To test my typology's hypotheses, I use congruence analysis of selected elites' decision making leading up to the 2003 United States-led invasion of Iraq. This qualitative analysis allows me to determine the errors and biases to which examined elites are susceptible and the elites' policy positions. I would like to offer to my committee heartfelt thanks for their assistance with what has been a long process. Juliet Kaarbo, co-chair of my committee, has been generous beyond all reasonable expectation. She has patiently encouraged, guided, and helped me even as her career took her across the Atlantic. I owe her a tremendous debt of gratitude. Mark Joslyn, also co-chair of my committee, has given me crucial moral support. Further, he and Donald Haider-Markel have played key roles in shepherding this project. I cannot overstate the importance of their support and the support of my entire committee. Above all, I thank my wife and family. They have tirelessly stood by me over the years, and the completion of my dissertation would not have been possible without them. v Table of Contents Introduction 1-14 Chapter 1: Theoretical Framework 15-98 Chapter 2: Research Design 99-130 Chapter 3: Quantitative Analysis of Personality Trait and Beliefs 131-170 Chapter 4: Qualitative Analysis of Decision Making 171-227 Chapter 5: Conclusion 228-233 References 234-246 Appendix A 247