ires HBS Case Thomas Green: Power, Office Politics, and a Career in Crisis. Part of the problem between Frank Davis and Thomas Green was their fundamental disagreement over what was important and on which activities and clients they should be focused. Green seemed to believe that no matter how hard he worked at pursuing the tasks, activities, and approaches that Davis insisted upon, he would not be successful and perform well in his job. House's path-goal theory explains the breakdown between Davis and Green quite well, as it holds that the most important aspect in leadership is the creation of expectancy, which refers to the follower's expectation that a task can be accomplished and that it will lead to rewards.