KARL E. WEICK is the Rensis Likert Collegiate Professor of Organizational Behavior and Psychology and professor of psychology at the University of Michigan Business School. His book, The Social Psychology of Organizing (1979), was designated by James Collins in Inc. magazine as one of the nine best business books ever written. KATHLEEN M. SUTCLIFFE is assistant professor of organizational behavior and human resource management at the University of Michigan Business School. She has published numerous articles on cognitive and experiential diversity in top management teams and on organizational performance.