The automobile has evolved ever since its inception. Some periods in history were met with great advances in design, and the late 1930s and early 1940s were no exception. Among the leaders in this evolution were the manufacturers from Detroit. Edsel Ford was famous for creating wild customs and using them for his own use. Harley Earl at General Motors, Ray Dietrich at Murray, and Ralph Roberts at Briggs were among the top coachbuilders and designers of their time.