G. Stanley Hall was an American psychologist and educator, born in 1844. He is best known for founding the field of developmental psychology and for his work in child psychology. Hall was the first president of the American Psychological Association and played a significant role in establishing psychology as a formal discipline in the United States. Hall also contributed to the study of adolescence, coining the term "storm and stress" to describe the emotional turbulence of this developmental stage. He founded Clark University in 1889, where he promoted research and education in psychology, influencing future generations of psychologists and educators.