Hugo Munsterberg is a pioneer in the fields of Industrial (I/O), Experimental, and Clinical Psychology. Also, he championed behaviorism, investigated the value of prayer, and challenged the effectiveness of eye witness testimonies. He was a famous Harvard professor who helped redefine Wundtian psychology into its modern form. However, the last years of his life were spent in stress and sorrow, and today, he is barely ackowledged.