Spinal arthrodesis was the first successful treatment for scoliosis, performed by Dr. Russell A. Hibbs in 1911 and later by Dr. Fred H. Albee for tuberculosis. In 1914, Dr. H.P.H. Galloway and Dr. Hibbs began using the method to treat neuromuscular scoliosis in patients with poliomyelitis. However, this treatment approach was plagued by loss of deformity correction over time and high pseudarthrosis rates. The turning point in the operative management of spinal deformities began in 1947 with Dr. Paul Randall Harrington when he started a decade-long process to revolutionize surgical treatment of spinal deformities culminating in the advent of the Harrington Rod, the first successful implantable spinal instrumentation system. During the epoch that he was in practice, Dr. Harrington's achievement influenced the technology and art of spine surgery for his contemporaries and the coming generations of spine surgeons. The purpose of this article is to review the life of Dr. Harrington, and how he has arguably come to be known as "Father of the Modern Treatment of Scoliosis."