This report seeks to understand executive leadership by focusing on a character type called "expansive." Expansive character revolves around mastery of tasks and a continual desire to accomplish. In the report, several goals are featured: to define what expansive character is; to discuss its origins; to show how moderate versus extreme degrees of expansiveness affects executive performance, for both good and bad; to consider its effect on the organization; and to discuss implications for development of the expansive executive. The report relies for evidence on executives studied for this research and those studied by others; two particular case studies are utilized. The first describes the research method of the report, and the second discusses subtypes of the expansive executive. Two appendices are included: (1) the research method used for the study; and (2) an explanation of the subtypes of the expansive executive. (DB)