Original: Hitler: a study in Tyranny by Alan Bullock On March 24, 1919, Karl Harrer (a sports journalist and member of the Thule Society) joined the DAP to increase the influence of the Thule Society over the DAP's activities, and the party name was changed to the "Political Workers' Circle".
Simplified: Hitler: a study in Tyranny by Alan Bullock On 24 March 1919, Karl Harrer (a sports journalist and member of the Thule Society) joined the DAP to try to get more control over the DAP for the Thule Society.