Crossroads of Social Science: The ICPSR 25th Anniversary Volume -- Contents -- About the Contributors -- Preface -- Introduction Crossroads of Social Science -- Chapter 1 Toward Cumulative Knowledge: Theoretical and Methodological Issues -- Comment Progress in Research Methodology: Theory, Technology, Training -- Chapter 2 A Strange Case of Identity Denied: American History as Social Science -- Cornment Time Is on the Historian's Side -- Chapter 3 When Social Science Findings Conflict -- Comment On Conflict Resolution: Right Makes Right -- Chapter 4 What We Know, What We Say We Know: Discrepancies Between Warranted and Unwarranted -- Comment Causal Inferences: Can Caution Have Limits? -- Chapter 5 Research Life as a Collection of Intersecting Probability Distributions -- Comment Innovation: Individuals, Ideas, and Institutions -- Comment Infrastructures for Comparative Political Research -- Author Index.