 After his education there, Jagan went to the United States to study dentistry, graduating from Northwestern University in Evanston, Illinois in 1942.Jagan returned to British Guiana in October 1943 and was soon joined by his American wife, the former Janet Rosenberg, who was to play a significant role in her new country's political development.Although Jagan established his own dentistry clinic, he was soon enmeshed in politics.